Coefficient of x^n in the expansion of ( (1-x+x^2)^2 / (1-x)^3 )^n.
A372411
Coefficient of x^n in the expansion of ( (1-x+x^2)^2 / (1-x)^3 )^n.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =34a(4) =183a(5) =1001a(6) =5578a(7) =31459a(8) =179063a(9) =1026493a(10) =5918007a(11) =34277728a(12) =199309146a(13) =1162682314a(14) =6801575641a(15) =39885002534a(16) =234384591991
External references
- oeis: A372411