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A066003
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Sum of digits of 7^n.
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20
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1, 7, 13, 10, 7, 22, 28, 25, 31, 28, 43, 49, 37, 52, 58, 64, 52, 58, 73, 79, 76, 82, 97, 85, 73, 97, 112, 91, 133, 121, 118, 115, 103, 127, 142, 157, 136, 115, 130, 136, 142, 148, 136, 169, 175, 163, 187, 175, 136, 178, 184, 217, 196, 220, 217
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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MATHEMATICA
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Table[Total[IntegerDigits[7^n]], {n, 55}] (* Harvey P. Dale, Nov 22 2010 *)
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PROG
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(Magma) [ &+Intseq(7^n): n in [0..60] ];
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CROSSREFS
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Cf. sum of digits of k^n: A001370 (k=2), A004166 (k=3), A065713 (k=4), A066001 (k=5), A066002 (k=6), this sequence (k=7), A066004 (k=8), A065999 (k=9), A066005 (k=11), A066006 (k=12), A175527 (k=13).
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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