The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A237661

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A237661

Indices of records in A237660.
(history; published version)

#16 by Charles R Greathouse IV at Mon Aug 14 15:53:51 EDT 2017

STATUS

editing

approved

#15 by Charles R Greathouse IV at Mon Aug 14 15:52:57 EDT 2017

LINKS

Charles R Greathouse IV, <a href="/A237661/a237661.c.txt">C code to find initial terms</a>

PROG

(C) See Greathouse link

(PARI) A237660(n)=my(k); if(n%2, n=3*n+1); n>>=valuation(n, 2); if(n==1, return(0)); k=n; while(1, n+=(n+1)>>1; n>>=valuation(n, 2); if(n==1, return(k), k=n))

r=0; for(n=1, 1e8, t=A237660(n); if(t>r, r=t; print1(n", "))) \\ Charles R Greathouse IV, Aug 14 2017

#14 by Charles R Greathouse IV at Mon Aug 14 15:36:06 EDT 2017

DATA

3, 42, 75, 151, 2730, 7281, 14563, 174762, 184111, 932067, 11184810, 13256071, 26512143, 715827882, 1908874353

EXTENSIONS

a(11)-a(1415) from Charles R Greathouse IV, Aug 14 2017

#13 by Charles R Greathouse IV at Mon Aug 14 15:20:14 EDT 2017

DATA

3, 42, 75, 151, 2730, 7281, 14563, 174762, 184111, 932067, 11184810, 13256071, 26512143, 715827882

EXTENSIONS

a(11)-a(14) from Charles R Greathouse IV, Aug 14 2017

STATUS

approved

editing

#12 by Charles R Greathouse IV at Mon Aug 14 11:44:46 EDT 2017

STATUS

proposed

approved

#11 by Michel Marcus at Mon Aug 14 11:32:26 EDT 2017

STATUS

editing

proposed

#10 by Michel Marcus at Mon Aug 14 11:32:17 EDT 2017

KEYWORD

nonn,more,changed

STATUS

approved

editing

Discussion

Mon Aug 14

11:32

Michel Marcus: more, right ?

#9 by Michel Marcus at Mon Aug 14 11:32:03 EDT 2017

STATUS

reviewed

approved

#8 by Joerg Arndt at Mon Aug 14 11:00:08 EDT 2017

STATUS

proposed

reviewed

#7 by Michael De Vlieger at Mon Aug 14 10:51:45 EDT 2017

STATUS

editing

proposed