A138959 a(n) = 8^n mod 5^n.

0, 3, 14, 12, 346, 1518, 12144, 65902, 370966, 1405228, 9288699, 45012717, 115961111, 439407638, 3515261104, 28122088832, 102906398156, 365487513373, 1398021200734, 14998866871497, 24623503331351, 387722889932058, 1194434486643964, 7171290102136087

Offset

0,2

Links

Table of n, a(n) for n=0..23.

Mathematica

a[n_]:=PowerMod[8, n, 5^n]; Array[a, 24, 0] (* James C. McMahon, Jun 23 2025 *)

Prog

(SageMath) [power_mod(8, n, 5^n) for n in range(0, 24)] # Zerinvary Lajos, Nov 28 2009
(PARI) a(n) = lift(Mod(8, 5^n)^n); \\ Michel Marcus, Feb 20 2018

Crossrefs

Cf. A000351, A001018.

Sequence in context: A155886 A319456 A222713 * A171653 A055435 A242868

Adjacent sequences: A138956 A138957 A138958 * A138960 A138961 A138962

Keyword

nonn

Author

N. J. A. Sloane, May 20 2008

Status

approved