Expansion of e.g.f. Product_{k>=1} 1 / (1 - arctan(x^k)).
A330537
Expansion of e.g.f. Product_{k>=1} 1 / (1 - arctan(x^k)).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =16a(4) =104a(5) =704a(6) =6368a(7) =58752a(8) =662272a(9) =7802880a(10) =106639872a(11) =1511241216a(12) =24062834688a(13) =398765162496
External references
- oeis: A330537