A086071 - OEIS

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A086071

Number of 0's in decimal expansion of triangular number n(n+1)/2.

10

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

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OFFSET

0,25

LINKS

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

EXAMPLE

tri(4)=10, so a(4)=1 and tri(24)=300, so a(24)=2.

MATHEMATICA

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

CROSSREFS

Cf. 1's A086072, 2's A086073, 3's A086074, 4's A086075, 5's A086076, 6's A086077, 7's A086078, 8's A086079, 9's A086080.

Sequence in context: A335460 A367077 A368073 * A322212 A089813 A343023

Adjacent sequences: A086068 A086069 A086070 * A086072 A086073 A086074

KEYWORD

base,nonn

AUTHOR

Jason Earls, Jul 08 2003

STATUS

approved