The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A008461

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A008461

Take sum of squares of digits of previous term.
(history; published version)

#9 by Ray Chandler at Tue Aug 25 10:31:46 EDT 2015

STATUS

editing

approved

#8 by Ray Chandler at Tue Aug 25 10:31:42 EDT 2015

LINKS

<a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1).

STATUS

approved

editing

#7 by Harvey P. Dale at Wed Mar 12 11:50:57 EDT 2014

STATUS

editing

approved

#6 by Harvey P. Dale at Wed Mar 12 11:50:53 EDT 2014

MATHEMATICA

NestList[Total[IntegerDigits[#]^2]&, 7, 100] (* Harvey P. Dale, Mar 12 2014 *)

STATUS

approved

editing

#5 by Russ Cox at Fri Mar 30 16:45:20 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com)_.

Discussion

Fri Mar 30

16:45

OEIS Server: https://oeis.org/edit/global/110

#4 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

KEYWORD

nonn,base,new

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

#3 by N. J. A. Sloane at Sun Jun 14 03:00:00 EDT 1998

REFERENCES

KEYWORD

nonn,base,new

#2 by N. J. A. Sloane at Wed Dec 11 03:00:00 EST 1996

REFERENCES

KEYWORD

nonn,base,new

#1 by N. J. A. Sloane at Fri Mar 15 03:00:00 EST 1996

NAME

Take sum of squares of digits of previous term.

DATA

7, 49, 97, 130, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

OFFSET

1,1

REFERENCES

KEYWORD

nonn,base

AUTHOR

njas

STATUS

approved