First column of A316273. Recurrence similar to series reversion giving Catalan numbers.

A239605

First column of A316273. Recurrence similar to series reversion giving Catalan numbers.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =24a(6) =66a(7) =178a(8) =508a(9) =1464a(10) =4320a(11) =12886a(12) =38992a(13) =119030a(14) =366740a(15) =1138036a(16) =3554962a(17) =11167292a(18) =35259290a(19) =111825840a(20) =356100044a(21) =1138107490a(22) =3649507278a(23) =11738028470a(24) =37857909164a(25) =122411024822

External references