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A086013
Number of 5's in decimal expansion of n^2.
11
0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 2, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0
OFFSET
0,76
LINKS
MATHEMATICA
DigitCount[(Range[0, 110])^2, 10, 5] (* Harvey P. Dale, Jul 26 2016 *)
PROG
(PARI) A086013(n)=#select(d->d==5, 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, 6's A086014, 7's A086015, 8's A086016, 9's A086017.
Cf. A269245 for the n^3 analog.
Sequence in context: A288558 A362831 A269241 * A340671 A167687 A064692
KEYWORD
base,nonn
AUTHOR
Jason Earls, Jul 07 2003
STATUS
approved