a(n) = numerator of b(n), where b(1) = 1, b(n) = Sum_{k=1..n-1} b(n-k) * H(k); H(k) = Sum_{j=1..k} 1/j, the k-th harmonic number.
A128044
a(n) = numerator of b(n), where b(1) = 1, b(n) = Sum_{k=1..n-1} b(n-k) * H(k); H(k) = Sum_{j=1..k} 1/j, the k-th harmonic number.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =35a(4) =27a(5) =156a(6) =25951a(7) =419681a(8) =646379a(9) =13439609a(10) =5544403a(11) =56359019a(12) =109370096651a(13) =218981057573
External references
- oeis: A128044