Triangle read by rows: T(n,k) = Eul(2*k + 1, k)*Eul(2*n - 2*k + 1, n - k) (0 <= k <= n), where Eul(i,j) are the Eulerian numbers A173018.

A244027

Triangle read by rows: T(n,k) = Eul(2*k + 1, k)*Eul(2*n - 2*k + 1, n - k) (0 <= k <= n), where Eul(i,j) are the Eulerian numbers A173018.

Terms

    a(0) =1a(1) =4a(2) =4a(3) =66a(4) =16a(5) =66a(6) =2416a(7) =264a(8) =264a(9) =2416a(10) =156190a(11) =9664a(12) =4356a(13) =9664a(14) =156190a(15) =15724248a(16) =624760a(17) =159456a(18) =159456a(19) =624760a(20) =15724248a(21) =2275172004a(22) =62896992a(23) =10308540a(24) =5837056a(25) =10308540a(26) =62896992a(27) =2275172004a(28) =447538817472a(29) =9100688016

External references