Expansion of ( (1/x) * Series_Reversion( x * ((1-x) / C(x))^4 ) )^(1/4), where C(x) is the g.f. of A000108.
A381820
Expansion of ( (1/x) * Series_Reversion( x * ((1-x) / C(x))^4 ) )^(1/4), where C(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =2a(2) =20a(3) =281a(4) =4599a(5) =82113a(6) =1550993a(7) =30473930a(8) =616463800a(9) =12753523628a(10) =268586285058
External references
- oeis: A381820