A137249 - cp's OEIS frontend

A137249 Expansion of g.f. z(2-2z+z^2+z^3)/((1+z)(1-3z+2*z^2-z^3)).

n	a(n)
1	2
2	2
3	7
4	15
5	37
6	84
7	197
8	456
9	1062
10	2467
11	5737
12	13335
13	31002
14	72069
15	167542
16	389486
17	905447
18	2104907
19	4893317
20	11375580
21	26445017
22	61477204
23	142917162
24	332242091
25	772369157
26	1795540447
27	4174125122
28	9703663625
29	22558281082

[2, 2, 7, 15, 37, 84, 197, 456, 1062, 2467, 5737, 13335, 31002, 72069, 167542, 389486, 905447, 2104907, 4893317, 11375580, 26445017, 61477204, 142917162, 332242091, 772369157, 1795540447, 4174125122, 9703663625, 22558281082]

cp's OEIS Frontend

A137249 Expansion of g.f. z(2-2z+z^2+z^3)/((1+z)(1-3z+2*z^2-z^3)).

Table of values

List of values

cp's OEIS Frontend

A137249 Expansion of g.f. z*(2-2*z+z^2+z^3)/((1+z)*(1-3*z+2*z^2-z^3)).

Table of values

List of values

A137249 Expansion of g.f. z(2-2z+z^2+z^3)/((1+z)(1-3z+2*z^2-z^3)).