Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + A(x)) = 1 + 2*Sum_{n>=1} x^(n*(n+1)/2).
A370141
Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + A(x)) = 1 + 2*Sum_{n>=1} x^(n*(n+1)/2).
Terms
- a(0) =1a(1) =-2a(2) =4a(3) =-8a(4) =14a(5) =-22a(6) =28a(7) =-14a(8) =-80a(9) =420a(10) =-1430a(11) =4128a(12) =-10798a(13) =26176a(14) =-59114a(15) =123442a(16) =-232240a(17) =365888a(18) =-355616a(19) =-475892a(20) =4318112a(21) =-17471288a(22) =56635490a(23) =-163101656a(24) =432173038a(25) =-1067080032a(26) =2456709054a(27) =-5216642696a(28) =9906435640a(29) =-15415122000
External references
- oeis: A370141