Coefficient of x^n in the expansion of ( (1-x+x^3)^2 / (1-x)^3 )^n.
A372417
Coefficient of x^n in the expansion of ( (1-x+x^3)^2 / (1-x)^3 )^n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =16a(4) =75a(5) =336a(6) =1536a(7) =7155a(8) =33627a(9) =158974a(10) =755508a(11) =3606648a(12) =17281776a(13) =83068766a(14) =400368741a(15) =1934204661a(16) =9363509531a(17) =45411373098a(18) =220593832062
External references
- oeis: A372417