A086079 Number of 8's in decimal expansion of triangular number n(n+1)/2.

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

Offset

0,88

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

Mathematica

DigitCount[Accumulate[Range[0, 100]], 10, 8] (* Paolo Xausa, May 05 2024 *)

Crossrefs

Cf. 0's A086071, 1's A086072, 2's A086073, 3's A086074, 4's A086075, 5's A086076, 6's A086077, 7's A086078, 9's A086080.

Cf. A000217.

Sequence in context: A276847 A271231 A306798 * A296338 A374216 A133703

Adjacent sequences: A086076 A086077 A086078 * A086080 A086081 A086082

Keyword

base,nonn

Author

Jason Earls, Jul 08 2003

Status

approved