This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A066005 #17 Dec 04 2024 15:39:52 %S A066005 1,2,4,8,16,14,28,38,40,53,43,41,55,47,76,71,88,86,82,83,94,71,97,95, %T A066005 118,101,112,125,124,140,145,137,139,143,178,140,172,200,184,188,205, %U A066005 203,190,164,175,215,196,248,190,218,265,251,223,230 %N A066005 Sum of digits of 11^n. %H A066005 Harry J. Smith, <a href="/A066005/b066005.txt">Table of n, a(n) for n = 0..1000</a> %F A066005 a(n) = A007953(A001020(n)). - _Michel Marcus_, Nov 01 2013 %t A066005 Total/@(IntegerDigits/@(11^Range[0,60])) (* _Harvey P. Dale_, Nov 02 2011 *) %o A066005 (PARI) a(n) = sumdigits(11^n); \\ _Michel Marcus_, Nov 01 2013 %Y A066005 Cf. sum of digits of k^n: A001370 (k=2), A004166 (k=3), A065713 (k=4), A066001 (k=5), A066002 (k=6), A066003 (k=7), A066004 (k=8), A065999 (k=9), this sequence (k=11), A066006 (k=12), A175527 (k=13). %K A066005 nonn,base %O A066005 0,2 %A A066005 _N. J. A. Sloane_, Dec 11 2001