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A216654 Number of n-digit 10th powers. 2
2, 0, 0, 1, 1, 0, 2, 1, 1, 2, 3, 3, 4, 6, 6, 8, 11, 13, 16, 20, 26, 33, 41, 52, 65, 82, 103, 129, 164, 205, 259, 326, 411, 516, 651, 819, 1030, 1298, 1634, 2056, 2590, 3259, 4104, 5166, 6504, 8188, 10308, 12977, 16337, 20567, 25893, 32597, 41037, 51662, 65039 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..1000

EXAMPLE

a(1) = 2: 0, 1.

a(4) = 1: 1024.

a(5) = 1: 59049.

a(7) = 2: 1048576, 9765625.

a(10) = 2: 1073741824, 3486784401.

a(11) = 3: 10000000000, 25937424601, 61917364224.

MAPLE

r:= proc(n, k) local b; b:= iroot(n, k); b+`if`(b^k<n, 1, 0) end:

a:= n-> r(10^n, 10) -r(10^(n-1), 10) +`if`(n=1, 1, 0):

seq(a(n), n=1..60);

CROSSREFS

Column k=10 of A216653.

Sequence in context: A280287 A147696 A001842 * A326016 A326033 A029429

Adjacent sequences:  A216651 A216652 A216653 * A216655 A216656 A216657

KEYWORD

nonn,base

AUTHOR

Alois P. Heinz, Sep 12 2012

STATUS

approved

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Last modified May 12 05:25 EDT 2021. Contains 343811 sequences. (Running on oeis4.)