A348474 - cp's OEIS frontend

A348474 Number of compositions of n into exactly 2n nonnegative parts such that each positive i-th part is odd if i is odd.

n	a(n)
0	1
1	2
2	8
3	41
4	220
5	1212
6	6803
7	38691
8	222196
9	1285610
10	7482718
11	43762754
12	256972507
13	1514020484
14	8945944435
15	52990732161
16	314568593860
17	1870939233546
18	11146516959176
19	66508200091575
20	397375460647690
21	2377167144881136
22	14236462650026064
23	85346464443885086

[1, 2, 8, 41, 220, 1212, 6803, 38691, 222196, 1285610, 7482718, 43762754, 256972507, 1514020484, 8945944435, 52990732161, 314568593860, 1870939233546, 11146516959176, 66508200091575, 397375460647690, 2377167144881136, 14236462650026064, 85346464443885086]

cp's OEIS Frontend

A348474 Number of compositions of n into exactly 2n nonnegative parts such that each positive i-th part is odd if i is odd.

Table of values

List of values