A158268 - cp's OEIS frontend

A158268 a(n) = coefficient of x^n in the (2^(n-1))-th iteration of x*C(x) where C(x) is the Catalan function (A000108), for n>=1.

n	a(n)
1	1
2	2
3	20
4	684
5	84864
6	40783952
7	78562790592
8	613738473236928
9	19459342629747109248
10	2496653806284295319455488
11	1291725241770954532057108070400
12	2687434858858114549619735481969223680

[1, 2, 20, 684, 84864, 40783952, 78562790592, 613738473236928, 19459342629747109248, 2496653806284295319455488, 1291725241770954532057108070400, 2687434858858114549619735481969223680]

cp's OEIS Frontend

A158268 a(n) = coefficient of x^n in the (2^(n-1))-th iteration of x*C(x) where C(x) is the Catalan function (A000108), for n>=1.

Table of values

List of values