A086016 - OEIS

A086016

Number of 8's in decimal expansion of n^2.

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 1, 2, 1, 1, 2, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1

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OFFSET

0,84

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

MATHEMATICA

DigitCount[(Range[0, 100])^2, 10, 8] (* G. C. Greubel, Dec 13 2016 *)

PROG

(PARI) A086016(n)=#select(d->d==8, digits(n^2)) \\ M. F. Hasler, Feb 21 2016

CROSSREFS

Cf. 0's A086008, 1's A086009, 2's A086010, 3's A086011, 4's A086012, 5's A086013, 6's A086014, 7's A086015, 9's A086017.

Cf. A269248 for the n^3 analog.