Triangle read by rows: T(n,k) = (n+2) * (Sum_{i=k..n} i!) / ((k+2) * k!) for 0 <= k <= n with T(i,j) = 0 if j < 0 or i < j.
A344381
Triangle read by rows: T(n,k) = (n+2) * (Sum_{i=k..n} i!) / ((k+2) * k!) for 0 <= k <= n with T(i,j) = 0 if j < 0 or i < j.
Terms
- a(0) =1a(1) =3a(2) =1a(3) =8a(4) =4a(5) =1a(6) =25a(7) =15a(8) =5a(9) =1a(10) =102a(11) =66a(12) =24a(13) =6a(14) =1a(15) =539a(16) =357a(17) =133a(18) =35a(19) =7a(20) =1a(21) =3496a(22) =2328a(23) =872a(24) =232a(25) =48a(26) =8a(27) =1a(28) =26613a(29) =17739
External references
- oeis: A344381