The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A066911

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A066911

Sum of primes < n that do not divide n.
(history; published version)

#17 by N. J. A. Sloane at Mon Sep 04 23:28:25 EDT 2017

STATUS

proposed

approved

#16 by Michael De Vlieger at Mon Sep 04 19:52:38 EDT 2017

STATUS

editing

proposed

#15 by Michael De Vlieger at Mon Sep 04 19:48:57 EDT 2017

LINKS

Michael De Vlieger, <a href="/A066911/b066911.txt">Table of n, a(n) for n = 1..10000</a>

MATHEMATICA

Table[Total@ Complement[Prime@ Range@ PrimePi@ n, FactorInteger[n][[All, 1]]], {n, 60}] (* Michael De Vlieger, Sep 04 2017 *)

STATUS

approved

editing

#14 by Joerg Arndt at Tue May 20 08:55:48 EDT 2014

STATUS

proposed

approved

#13 by Jon E. Schoenfield at Tue May 20 08:47:19 EDT 2014

STATUS

editing

proposed

#12 by Jon E. Schoenfield at Tue May 20 08:47:15 EDT 2014

COMMENTS

Equals row sums of triangle A143655. [_- _Gary W. Adamson_, Aug 28 2008]

STATUS

proposed

editing

#11 by Michel Marcus at Tue May 20 06:30:25 EDT 2014

STATUS

editing

proposed

#10 by Michel Marcus at Tue May 20 06:18:05 EDT 2014

COMMENTS

Equals row sums of triangle A143655 . [From __Gary W. Adamson_, Aug 28 2008]

FORMULA

a(prime(n)) = A007504(n-1). - Michel Marcus, May 20 2014

PROG

(PARI) a(n) = sum(i=1, n-1, if (isprime(i) && (n%i), i)); \\ Michel Marcus, May 20 2014

CROSSREFS

A143655 [From Gary W. Adamson, Aug 28 2008]

Cf. A007504, A143655.

STATUS

approved

editing

#9 by Charles R Greathouse IV at Wed Apr 09 10:12:19 EDT 2014

AUTHOR

Leroy Quet , Jan 22 2002

Discussion

Wed Apr 09

10:12

OEIS Server: https://oeis.org/edit/global/2145

#8 by N. J. A. Sloane at Wed Feb 05 20:18:01 EST 2014

AUTHOR

_Leroy Quet _ Jan 22 2002

Discussion

Wed Feb 05

20:18

OEIS Server: https://oeis.org/edit/global/2118