a(n) = (n!/6) * Sum_{i,j,k > 0 and i+j+k=n} A000593(i)*A000593(j)*A000593(k)/(i*j*k).
A338788
a(n) = (n!/6) * Sum_{i,j,k > 0 and i+j+k=n} A000593(i)*A000593(j)*A000593(k)/(i*j*k).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =6a(4) =95a(5) =585a(6) =8974a(7) =70252a(8) =1178540a(9) =10683180a(10) =201213936a(11) =2151034776a(12) =46320457248a(13) =557515105056
External references
- oeis: A338788