O.g.f.: A(x) = Sum_{n>=0} x^n / Product_{k=0..n} (1 - k*(k+1)/2*x).
A124373
O.g.f.: A(x) = Sum_{n>=0} x^n / Product_{k=0..n} (1 - k*(k+1)/2*x).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =25a(5) =135a(6) =909a(7) =7417a(8) =71698a(9) =806968a(10) =10427825a(11) =152915697a(12) =2519879761a(13) =46276398129a(14) =940296067422
External references
- oeis: A124373