Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 2*A(x)) = 1 + 3*Sum_{n>=1} x^(n*(n+1)/2).
A370142
Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 2*A(x)) = 1 + 3*Sum_{n>=1} x^(n*(n+1)/2).
Terms
- a(0) =1a(1) =-3a(2) =9a(3) =-27a(4) =78a(5) =-219a(6) =591a(7) =-1500a(8) =3420a(9) =-6153a(10) =3315a(11) =44466a(12) =-324276a(13) =1627002a(14) =-7069893a(15) =28345875a(16) =-107618916a(17) =391749108a(18) =-1375531170a(19) =4669215090a(20) =-15311251593a(21) =48316101369a(22) =-145501913850a(23) =411323278248
External references
- oeis: A370142