a(n) = 4^n * [x^n] 1/sqrt(1-x) * Product_{k>=1} (1 + x^k).
A325950
a(n) = 4^n * [x^n] 1/sqrt(1-x) * Product_{k>=1} (1 + x^k).
Terms
- a(0) =1a(1) =6a(2) =30a(3) =204a(4) =1014a(5) =5716a(6) =31212a(7) =163480a(8) =826278a(9) =4320132a(10) =22096324a(11) =110079016a(12) =552324796a(13) =2721379144a(14) =13415146648a(15) =66143801648a(16) =321016593670
External references
- oeis: A325950