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 A118881 Square of sum of decimal digits of n. 9
 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 36, 49, 64, 81, 100, 121, 144 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS N. J. A. Sloane, Table of n, a(n) for n = 0..10000 FORMULA a(n) = (A007953(n))^2. [From R. J. Mathar, Apr 22 2010] EXAMPLE Trajectories of the map x->a(x), A177148: 1 ->1 ->1 ->1 ->1 ->1 ->1 ->1 ->1 ->,.. 2 ->4 ->16 ->49 ->169 ->256 ->169 ->256 ->169 ->.. 3 ->9 ->81 ->81 ->81 ->81 ->81 ->81 ->81 ->.. 4 ->16 ->49 ->169 ->256 ->169 ->256 ->169 ->256 ->.. 5 ->25 ->49 ->169 ->256 ->169 ->256 ->169 ->256 ->.. 6 ->36 ->81 ->81 ->81 ->81 ->81 ->81 ->81 ->.. 7 ->49 ->169 ->256 ->169 ->256 ->169 ->256 ->169 ->.. 8 ->64 ->100 ->1 ->1 ->1 ->1 ->1 ->1 ->.. - R. J. Mathar, Jul 08 2012 MAPLE read("transforms") : A118881 := proc(n)         digsum(n)^2 ; end proc: # R. J. Mathar, Jul 08 2012 MATHEMATICA Table[Total[IntegerDigits[n]]^2, {n, 0, 70}] (* Harvey P. Dale, Jul 31 2012 *) CROSSREFS Sequence in context: A062331 A069940 A153211 * A277342 A098733 A068522 Adjacent sequences:  A118878 A118879 A118880 * A118882 A118883 A118884 KEYWORD base,easy,nonn AUTHOR Giovanni Teofilatto, May 25 2006 STATUS approved

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Last modified September 23 16:09 EDT 2020. Contains 337311 sequences. (Running on oeis4.)