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 A053837 Sum of digits of n modulo 10. 6
 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA a(n) =A010879(A007953(n)) =(n+a(floor[n/10])) mod 10. So can construct sequence by starting with 0 and mapping 0->0123456789, 1->1234567890, 2->2345678901 etc. (e.g. 0, 0123456789, 0123456789123456789023456789013456789012456..., etc.) and looking at n-th digit of a term with sufficient digits. EXAMPLE a(59)=4 because 5+9 = 14 = 4 mod 10 MATHEMATICA Table[Mod[Total[IntegerDigits[n]], 10], {n, 0, 120}] (* Harvey P. Dale, Oct 02 2018 *) CROSSREFS Cf. A000120, A007953, A010060, A053838-A053844. Sequence in context: A037265 A292685 A285093 * A128244 A010888 A177274 Adjacent sequences:  A053834 A053835 A053836 * A053838 A053839 A053840 KEYWORD base,nonn AUTHOR Henry Bottomley, Mar 28 2000 STATUS approved

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Last modified October 20 12:34 EDT 2018. Contains 316379 sequences. (Running on oeis4.)