a(n) is the constant term in the expansion of Product_{k=1..n} (x^k + 1/x^k)^k.
A350283
a(n) is the constant term in the expansion of Product_{k=1..n} (x^k + 1/x^k)^k.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =6a(4) =76a(5) =0a(6) =0a(7) =7559080a(8) =1509040932a(9) =0a(10) =0a(13) =0a(14) =0a(17) =0a(18) =0
External references
- oeis: A350283