A231373 - cp's OEIS frontend

A231373 G.f. A(x) satisfies: A(x-x^2-x^3) = 1/sqrt(1-2x-3x^2), which is the g.f. the central trinomial coefficients (A002426).

n	a(n)
0	1
1	1
2	4
3	16
4	71
5	327
6	1550
7	7490
8	36720
9	182028
10	910330
11	4585318
12	23233722
13	118315318
14	605088690
15	3105994302
16	15994906965
17	82602799485
18	427662046960
19	2219130114108
20	11538302709769
21	60102637378353
22	313591732265662
23	1638671208390738
24	8574718477933404
25	44926247350136232

[1, 1, 4, 16, 71, 327, 1550, 7490, 36720, 182028, 910330, 4585318, 23233722, 118315318, 605088690, 3105994302, 15994906965, 82602799485, 427662046960, 2219130114108, 11538302709769, 60102637378353, 313591732265662, 1638671208390738, 8574718477933404, 44926247350136232]

cp's OEIS Frontend

A231373 G.f. A(x) satisfies: A(x-x^2-x^3) = 1/sqrt(1-2x-3x^2), which is the g.f. the central trinomial coefficients (A002426).

Table of values

List of values

cp's OEIS Frontend

A231373 G.f. A(x) satisfies: A(x-x^2-x^3) = 1/sqrt(1-2*x-3*x^2), which is the g.f. the central trinomial coefficients (A002426).

Table of values

List of values

A231373 G.f. A(x) satisfies: A(x-x^2-x^3) = 1/sqrt(1-2x-3x^2), which is the g.f. the central trinomial coefficients (A002426).