A081731 a(n)=1/60*(A000364(n+2)-A000364(n)).

1, 23, 841, 45023, 3321841, 323146823, 40078005241, 6172529945423, 1155774491891041, 258569396539480823, 68116719340312179241, 20870735447824438473023, 7358996769608563523829841

Offset

1,2

Links

Table of n, a(n) for n=1..13.

Crossrefs

Cf. A000364, A060075.

Sequence in context: A027410 A158505 A217116 * A335496 A183523 A233339

Adjacent sequences: A081728 A081729 A081730 * A081732 A081733 A081734

Keyword

nonn

Author

Benoit Cloitre, Apr 06 2003

Status

approved