Central coefficient of Product_{k=0..n} (1+k*x)^2.
A129256
Central coefficient of Product_{k=0..n} (1+k*x)^2.
Terms
- a(0) =1a(1) =2a(2) =13a(3) =144a(4) =2273a(5) =46710a(6) =1184153a(7) =35733376a(8) =1251320145a(9) =49893169050
External references
- oeis: A129256