G.f.: Sum_{n>=0} a(n)*x^n/2^(n^2+n) = exp( Sum_{n>=1} x^n/[n*2^(n^2)] ).
A165940
G.f.: Sum_{n>=0} a(n)*x^n/2^(n^2+n) = exp( Sum_{n>=1} x^n/[n*2^(n^2)] ).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =152a(4) =7684a(5) =1352096a(6) =852120928
External references
- oeis: A165940