Coefficient of x^n in the expansion of ( (1+x)^2 / (1-x^3) )^n.
A370213
Coefficient of x^n in the expansion of ( (1+x)^2 / (1-x^3) )^n.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =102a(5) =477a(6) =2265a(7) =10831a(8) =52134a(9) =252581a(10) =1230831a(11) =6027012a(12) =29630793a(13) =146162525a(14) =723042585a(15) =3585576123a(16) =17819138214a(17) =88723077165a(18) =442503268107
External references
- oeis: A370213