A277590 - OEIS

A277590

Numbers k such that k/10^m == 3 mod 10, where 10^m is the greatest power of 10 that divides n.

3, 13, 23, 30, 33, 43, 53, 63, 73, 83, 93, 103, 113, 123, 130, 133, 143, 153, 163, 173, 183, 193, 203, 213, 223, 230, 233, 243, 253, 263, 273, 283, 293, 300, 303, 313, 323, 330, 333, 343, 353, 363, 373, 383, 393, 403, 413, 423, 430, 433, 443, 453, 463, 473

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OFFSET

1,1

COMMENTS

Positions of 3 inA065881.

Numbers having 3 as rightmost nonzero digit in base 10. This is one sequence in a 10-way splitting of the positive integers; the other nine are indicated in the Mathematica program.

LINKS

Clark Kimberling,Table of n, a(n) for n = 1..10000

MATHEMATICA

z = 460; a[b_]:= Table[Mod[n/b^IntegerExponent[n, b], b], {n, 1, z}]

p[b_, d_]:= Flatten[Position[a[b], d]]

p[10, 1] (*A277588*)

p[10, 2] (*A277589*)

p[10, 3] (*A277590*)

p[10, 4] (*A277591*)

p[10, 5] (*A277592*)

p[10, 6] (*A277593*)

p[10, 7] (*A277594*)