A072840 Duplicate of A023921.

1, 0, 0, 0, 0, 0, 0, 0, 0, 20, 0, 0, 0, 0, 0, 0, 90, 0, 0, 0, 90, 240, 0, 0, 420, 252, 0, 0, 0, 720, 0, 0, 0, 0, 0, 0, 1700, 0, 0, 0, 1260, 2700, 0, 0, 3240, 1680, 0, 0, 0, 5220, 0, 0, 0, 0, 0, 0, 7740, 0, 0, 0, 4920, 10080, 0, 0, 12690, 7020, 0, 0, 0, 15120, 0, 0, 0, 0, 0, 0, 22680, 0, 0

Offset

0,10

Links

Table of n, a(n) for n=0..78.

Crossrefs

Sequence in context: A137643 A351570 A023921 * A091234 A221873 A278073

Adjacent sequences: A072837 A072838 A072839 * A072841 A072842 A072843

Keyword

dead

Status

approved