Expansion of e.g.f. Product_{k>=1} (1 + arctan(x^k)).
A330543
Expansion of e.g.f. Product_{k>=1} (1 + arctan(x^k)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =10a(4) =48a(5) =344a(6) =2400a(7) =22128a(8) =223104a(9) =2520576a(10) =30689280a(11) =415560960a(12) =6058229760a(13) =95710187520
External references
- oeis: A330543