Triangle read by rows, the Riordan square of the number of achiral m-color cyclic compositions of n (A308747). T(n,k) for 1 <= k <= n.

A336452

Triangle read by rows, the Riordan square of the number of achiral m-color cyclic compositions of n (A308747). T(n,k) for 1 <= k <= n.

Terms

    a(0) =1a(1) =3a(2) =3a(3) =6a(4) =15a(5) =9a(6) =13a(7) =49a(8) =63a(9) =27a(10) =23a(11) =137a(12) =276a(13) =243a(14) =81a(15) =44a(16) =338a(17) =969a(18) =1323a(19) =891a(20) =243a(21) =73a(22) =782a(23) =2950a(24) =5589a(25) =5778a(26) =3159a(27) =729a(28) =131a(29) =1695

External references