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A214880 5-adic valuation of A007185. 4
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified August 20 14:50 EDT 2019. Contains 326152 sequences. (Running on oeis4.)