A086008 Number of 0's in decimal expansion of n^2.

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 1, 1, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 1, 1, 1, 2, 1, 1, 1, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 1, 1, 1, 4, 2, 2, 2, 1

Offset

0,11

Links

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

Example

10^2 = 100, so a(10)=2 and 32^2 = 1024, so a(32)=1.

Mathematica

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

Prog

(PARI) A086008(n)=!n+#select(d->!d, digits(n^2)) \\ M. F. Hasler, Feb 21 2016

Crossrefs

Cf. 1's A086009, 2's A086010, 3's A086011, 4's A086012, 5's A086013, 6's A086014, 7's A086015, 8's A086016, 9's A086017.

Cf. A269250 for the n^3 analog.

Sequence in context: A332015 A173667 A241541 * A083910 A069843 A069849

Adjacent sequences: A086005 A086006 A086007 * A086009 A086010 A086011

Keyword

base,nonn

Author

Jason Earls, Jul 07 2003

Status

approved