OFFSET
1,1
COMMENTS
Positions of 2 in A065881.
Numbers having 2 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 *)
p[10, 8] (* A277595 *)
p[10, 9] (* A277596 *)
PROG
(PARI) is(n)=n && n/10^valuation(n, 10)%10==2 \\ Charles R Greathouse IV, Jan 31 2017
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
Clark Kimberling, Nov 05 2016
STATUS
approved