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A086077
Number of 6's in decimal expansion of triangular number n(n+1)/2.
10
0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 2, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 3, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 2, 0, 0, 0, 0, 0, 0, 1, 1
OFFSET
0,12
LINKS
MATHEMATICA
DigitCount[#, 10, 6]&/@Accumulate[Range[0, 120]] (* Harvey P. Dale, Apr 19 2022 *)
CROSSREFS
Cf. 0's A086071, 1's A086072, 2's A086073, 3's A086074, 4's A086075, 5's A086076, 7's A086078, 8's A086079, 9's A086080.
Sequence in context: A341001 A221836 A279372 * A178408 A073345 A216511
KEYWORD
base,nonn
AUTHOR
Jason Earls, Jul 08 2003
STATUS
approved