Expansion of e.g.f. exp(Sum_{k>=1} x^(k^2)*(1 + x^(k^2))/k^2).
A306831
Expansion of e.g.f. exp(Sum_{k>=1} x^(k^2)*(1 + x^(k^2))/k^2).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =31a(5) =111a(6) =601a(7) =2773a(8) =27777a(9) =230401a(10) =2484811a(11) =22999791a(12) =254852863a(13) =2615840527a(14) =29661610161a(15) =321837060301
External references
- oeis: A306831