A197772 - cp's OEIS frontend

A197772 G.f.: A(x) = 1/(1 - xB(x)), where B(x) = 1/(1 - xC(x)^2); C(x) = 1/(1 - xD(x)^3); D(x) = 1/(1 - xE(x)^4); ...

n	a(n)
0	1
1	1
2	2
3	6
4	25
5	138
6	968
7	8313
8	84735
9	1000322
10	13418848
11	201526744
12	3348677251
13	60981586323
14	1207531891440
15	25829355773719
16	593485342700358
17	14577731251921826
18	381175458103542506
19	10570762449548976706
20	309889778765890035970
21	9575316933047901325098

[1, 1, 2, 6, 25, 138, 968, 8313, 84735, 1000322, 13418848, 201526744, 3348677251, 60981586323, 1207531891440, 25829355773719, 593485342700358, 14577731251921826, 381175458103542506, 10570762449548976706, 309889778765890035970, 9575316933047901325098]

cp's OEIS Frontend

A197772 G.f.: A(x) = 1/(1 - xB(x)), where B(x) = 1/(1 - xC(x)^2); C(x) = 1/(1 - xD(x)^3); D(x) = 1/(1 - xE(x)^4); ...

Table of values

List of values

cp's OEIS Frontend

A197772 G.f.: A(x) = 1/(1 - x*B(x)), where B(x) = 1/(1 - x*C(x)^2); C(x) = 1/(1 - x*D(x)^3); D(x) = 1/(1 - x*E(x)^4); ...

Table of values

List of values

A197772 G.f.: A(x) = 1/(1 - xB(x)), where B(x) = 1/(1 - xC(x)^2); C(x) = 1/(1 - xD(x)^3); D(x) = 1/(1 - xE(x)^4); ...