A067509 Powers of 5 with digit sum divisible by 5.

5, 390625, 9765625, 37252902984619140625, 9094947017729282379150390625, 227373675443232059478759765625, 3552713678800500929355621337890625, 2220446049250313080847263336181640625

Offset: 1

Author

Amarnath Murthy, Feb 11 2002

Keywords

• base
• easy
• nonn

Links

• Robert Israel, Table of n, a(n) for n = 1..298

Crossrefs

Subsequence of A000351.

Cf. A067499, A067500, A067501, A067502, A067503, A067504, A067505, A067506, A067507.

Programs

Maple

filter:= proc(n) convert(convert(n,base,10),`+`) mod 5 = 0 end proc:
select(filter, [seq(5^n,n=1..100)]); # Robert Israel, Apr 21 2020

Extensions

More terms from Sascha Kurz, Mar 18 2002

Offset changed by Robert Israel, Apr 21 2020