E.g.f.: exp(x + 4*x^2 + 9*x^3 + 16*x^4).
A293723
E.g.f.: exp(x + 4*x^2 + 9*x^3 + 16*x^4).
Terms
- a(0) =1a(1) =1a(2) =9a(3) =79a(4) =841a(5) =7821a(6) =118681a(7) =1782019a(8) =28600209a(9) =490277881a(10) =9841912201a(11) =200678086071
External references
- oeis: A293723