a(n) equals the coefficient of x^n in Sum_{m>=0} (x^m + 2 + 1/x^m)^m for n >= 1.
A316592
a(n) equals the coefficient of x^n in Sum_{m>=0} (x^m + 2 + 1/x^m)^m for n >= 1.
Terms
- a(0) =1a(1) =4a(2) =15a(3) =57a(4) =210a(5) =798a(6) =3003a(7) =11468a(8) =43759a(9) =168080a(10) =646646a(11) =2496647a(12) =9657700a(13) =37444162a(14) =145422720a(15) =565730729a(16) =2203961430a(17) =8597528644a(18) =33578000610a(19) =131282534380a(20) =513791608421
External references
- oeis: A316592