A136654 - cp's OEIS frontend

A136654 G.f.: A(x) = (1/x)Series_Reversion( x/Sum_{k=0..n} 2^[k(k-1)/2]x^k ).

n	a(n)
0	1
1	1
2	3
3	15
4	117
5	1565
6	41663
7	2378147
8	286991465
9	71261033273
10	35889915535835
11	36421251158141399
12	74222529448186797341
13	303194457634544530959125
14	2480120130065258782050157847
15	40601998283406419045206334661611

[1, 1, 3, 15, 117, 1565, 41663, 2378147, 286991465, 71261033273, 35889915535835, 36421251158141399, 74222529448186797341, 303194457634544530959125, 2480120130065258782050157847, 40601998283406419045206334661611]

cp's OEIS Frontend

A136654 G.f.: A(x) = (1/x)Series_Reversion( x/Sum_{k=0..n} 2^[k(k-1)/2]x^k ).

Table of values

List of values

cp's OEIS Frontend

A136654 G.f.: A(x) = (1/x)*Series_Reversion( x/Sum_{k=0..n} 2^[k(k-1)/2]*x^k ).

Table of values

List of values

A136654 G.f.: A(x) = (1/x)Series_Reversion( x/Sum_{k=0..n} 2^[k(k-1)/2]x^k ).