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 A053840 (Sum of digits of n written in base 5) modulo 5. 2
 0, 1, 2, 3, 4, 1, 2, 3, 4, 0, 2, 3, 4, 0, 1, 3, 4, 0, 1, 2, 4, 0, 1, 2, 3, 1, 2, 3, 4, 0, 2, 3, 4, 0, 1, 3, 4, 0, 1, 2, 4, 0, 1, 2, 3, 0, 1, 2, 3, 4, 2, 3, 4, 0, 1, 3, 4, 0, 1, 2, 4, 0, 1, 2, 3, 0, 1, 2, 3, 4, 1, 2, 3, 4, 0, 3, 4, 0, 1, 2, 4, 0, 1, 2, 3, 0, 1, 2, 3, 4, 1, 2, 3, 4, 0, 2, 3, 4, 0, 1, 4, 0, 1, 2, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n) is the fourth row of the array in A141803, so a(n) = A141803(A055998(n+1)) for n>0. - Andrey Zabolotskiy, May 16 2016 LINKS Michael De Vlieger, Table of n, a(n) for n = 0..10000 Glen Joyce C. Dulatre, Jamilah V. Alarcon, Vhenedict M. Florida, Daisy Ann A. Disu, On Fractal Sequences, DMMMSU-CAS Science Monitor (2016-2017) Vol. 15 No. 2, 109-113. Robert Walker, Self Similar Sloth Canon Number Sequences FORMULA a(n) = A010874(A053824(n)). - Andrey Zabolotskiy, May 18 2016 MATHEMATICA Mod[Total@ IntegerDigits[#, 5], 5] & /@ Range[0, 120] (* Michael De Vlieger, May 17 2016 *) PROG (PARI) a(n) = vecsum(digits(n, 5)) % 5; \\ Michel Marcus, May 16 2016 CROSSREFS Cf. A010060. Sequence in context: A256914 A171171 A159957 * A010883 A011542 A260688 Adjacent sequences:  A053837 A053838 A053839 * A053841 A053842 A053843 KEYWORD base,nonn AUTHOR Henry Bottomley, Mar 28 2000 STATUS approved

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Last modified December 5 00:42 EST 2020. Contains 338943 sequences. (Running on oeis4.)