Expansion of e.g.f. 1 / [ Sum_{n>=0} (-x)^(n*(n+1)/2) / (n*(n+1)/2)! ].
A198891
Expansion of e.g.f. 1 / [ Sum_{n>=0} (-x)^(n*(n+1)/2) / (n*(n+1)/2)! ].
Terms
- a(0) =1a(1) =1a(2) =2a(3) =7a(4) =32a(5) =180a(6) =1219a(7) =9646a(8) =87192a(9) =886536a(10) =10016159a(11) =124481258a(12) =1687686528a(13) =24787991800a(14) =392081193504
External references
- oeis: A198891