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A086012 Number of 4's in decimal expansion of n^2. 11
0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 1, 2, 2, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 3, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 2, 0, 1, 1, 1, 2, 2, 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 1, 0, 0, 0, 1, 1, 0, 0, 0, 2, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,13

LINKS

Table of n, a(n) for n=0..104.

PROG

(PARI) A086012(n)=#select(d->d==4, digits(n^2)) \\ M. F. Hasler, Feb 21 2016

CROSSREFS

Cf. 0's A086008, 1's A086009, 2's A086010, 3's A086011, 5's A086013, 6's A086014, 7's A086015, 8's A086016, 9's A086017.

Cf. A269244 for the n^3 analog.

Sequence in context: A033772 A086015 A249856 * A248394 A127268 A252459

Adjacent sequences:  A086009 A086010 A086011 * A086013 A086014 A086015

KEYWORD

base,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Jul 07 2003

STATUS

approved

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Last modified December 7 20:56 EST 2016. Contains 278895 sequences.