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 A175512 (Digit sum of 7^n) mod n. 4
 0, 1, 1, 3, 2, 4, 4, 7, 1, 3, 5, 1, 0, 2, 4, 4, 7, 1, 3, 16, 19, 9, 16, 1, 22, 8, 10, 21, 5, 28, 22, 7, 28, 6, 17, 28, 4, 16, 19, 22, 25, 10, 40, 43, 28, 3, 34, 40, 31, 34, 13, 40, 8, 1, 49, 43, 10, 9, 34, 19, 22, 8, 19, 40, 52, 64, 0, 66, 37, 49, 52, 55, 58, 70, 37, 49, 11, 64, 6, 25, 28, 67, 43, 55, 40, 20, 64, 13, 8, 28, 49, 34, 82, 0, 79, 82, 85, 61, 73, 67 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS MATHEMATICA Table[Mod[Plus@@IntegerDigits[7^n], n], {n, 150}] [From Harvey P. Dale, Dec. 16, 2010] CROSSREFS Cf. A000420, A066003, A067863; A000079, A001370, A175434, A175169. Sequence in context: A327637 A047993 A033177 * A240829 A284013 A241412 Adjacent sequences:  A175509 A175510 A175511 * A175513 A175514 A175515 KEYWORD base,nonn AUTHOR N. J. A. Sloane, Dec 03 2010 STATUS approved

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Last modified May 6 09:45 EDT 2021. Contains 343580 sequences. (Running on oeis4.)