A214880 5-adic valuation of A007185.

1, 2, 4, 4, 5, 6, 7, 8, 9, 10, 11, 12, 17, 14, 15, 18, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 29, 30, 33, 33, 33, 35, 35, 36, 37, 38, 40, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 54, 54, 54, 54, 55, 56, 57, 58, 59, 61, 61, 63, 63, 66, 66, 66, 67

Offset

1,2

Comments

a(n) >= n.

It appears that the density of n such that a(n) = n is 4/5.

Links

Eric M. Schmidt, Table of n, a(n) for n = 1..10000

Index entries for sequences related to automorphic numbers

Prog

(GAP) A214880 := function(max) local result, i; result := [5]; for i in [2..max] do Add(result, result[i-1]^2 mod 10^i); od; result := List(result, x->Valuation(x, 5)); return result; end;

Crossrefs

Cf. A214881, A214882, A214883.

Sequence in context: A244320 A084616 A196259 * A071193 A071192 A295012

Adjacent sequences: A214877 A214878 A214879 * A214881 A214882 A214883

Keyword

nonn,base

Author

Eric M. Schmidt, Jul 29 2012

Status

approved