Irregular triangle M_2(n,k) read by rows: number of maximum k-matchings in rooted plane trees of size n, 1<=k<=n/2, 2<=n.

A219731

Irregular triangle M_2(n,k) read by rows: number of maximum k-matchings in rooted plane trees of size n, 1<=k<=n/2, 2<=n.

Terms

    a(0) =1a(1) =4a(2) =9a(3) =3a(4) =16a(5) =28a(6) =25a(7) =135a(8) =15a(9) =36a(10) =462a(11) =220a(12) =49a(13) =1274a(14) =1638a(15) =91a(16) =64a(17) =3024a(18) =8400a(19) =1820a(20) =81a(21) =6426a(22) =33660a(23) =18360a(24) =612a(25) =100a(26) =12540a(27) =112860a(28) =125970a(29) =15504

External references