A151753 Leading digits of A151752.

5, 7, 3, 9, 5, 3, 3, 9, 1, 3, 7, 7, 3, 7, 7, 5, 1, 5, 7, 9, 3, 7, 3, 3, 9, 9, 9, 5, 3, 7, 1, 7, 9, 5, 7, 9, 3, 1, 3, 9, 5, 7, 5, 5, 7, 7, 1, 1, 3, 1, 9, 5, 9, 1, 9, 5, 5, 7, 7, 7, 7, 7, 9, 7, 9, 9, 7, 7, 3, 3, 5, 9, 7, 7, 1, 1, 5, 9, 7, 1, 5, 1, 7, 5, 9, 1, 7, 9, 3, 5, 3, 9, 1, 7, 9, 9, 1, 9, 9, 1, 5, 3, 7, 5, 9

Offset

1,1

Links

Alois P. Heinz, Table of n, a(n) for n = 1..10000

Formula

a(n) = A000030(A151752(n)). - Omar E. Pol, Jul 04 2019

Maple

a:= proc(n) option remember; local k, l; if n=1 then b(1):= 5; 5 else a(n-1); l:= b(n-1); for k from 1 to 9 by 2 while (parse(cat(k, l)) mod 5^n)<>0 do od; b(n):= parse(cat(k, l)); k fi end:
seq(a(n), n=1..120); # Alois P. Heinz, Jun 18 2009

Crossrefs

Cf. A000030, A151752.

Sequence in context: A345653 A091663 A011316 * A144543 A205135 A356360

Adjacent sequences: A151750 A151751 A151752 * A151754 A151755 A151756

Keyword

nonn,base

Author

Max Alekseyev, Jun 17 2009

Extensions

More terms from Alois P. Heinz, Jun 18 2009

Status

approved