A368771
a(n) = (n!)^3 * Sum_{k=0..n} k^2/(k!)^3.
Original entry on oeis.org
0, 1, 12, 333, 21328, 2666025, 575861436, 197520472597, 101130481969728, 73724121355931793, 73724121355931793100, 98126805524745216616221, 169563119946759734312830032, 372530174523031136285287580473, 1022222798891197437966829120818108
Offset: 0
A368776
a(n) = (n+1)^2 * (n!)^3 * Sum_{k=0..n} 1/((k+1)^2 * (k!)^3).
Original entry on oeis.org
1, 5, 91, 4369, 436901, 78642181, 23120801215, 10358118944321, 6712061075920009, 6040854968328008101, 7309434511676889802211, 11578144266496193446702225, 23480476572454280309912112301, 59828254306613506229656062142949
Offset: 0
A368788
a(n) = (n+1) * (n!)^3 * Sum_{k=1..n} 1/((k+1) * (k!)^3).
Original entry on oeis.org
0, 1, 13, 469, 37521, 5628151, 1418294053, 555971268777, 320239450815553, 259393955160597931, 285333350676657724101, 414304025182507015394653, 775577135141653132818790417, 1835015501745151312249258126623
Offset: 0
Showing 1-3 of 3 results.