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A081731
a(n)=1/60*(A000364(n+2)-A000364(n)).
0
1, 23, 841, 45023, 3321841, 323146823, 40078005241, 6172529945423, 1155774491891041, 258569396539480823, 68116719340312179241, 20870735447824438473023, 7358996769608563523829841
OFFSET
1,2
CROSSREFS
Sequence in context: A027410 A158505 A217116 * A335496 A183523 A233339
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Apr 06 2003
STATUS
approved