A289249 - cp's OEIS frontend

A289249 Number of compositions of n if only the order of parts 1 and 2 matters.

n	a(n)
0	1
1	1
2	2
3	4
4	7
5	12
6	21
7	35
8	59
9	98
10	162
11	266
12	437
13	713
14	1163
15	1893
16	3077
17	4995
18	8105
19	13139
20	21293
21	34492
22	55858
23	90438
24	146406
25	236974
26	383538
27	620703
28	1004471
29	1625447
30	2630249
31	4256087
32	6886804
33	11143447
34	18030911
35	29175137
36	47206975
37	76383199
38	123591458

[1, 1, 2, 4, 7, 12, 21, 35, 59, 98, 162, 266, 437, 713, 1163, 1893, 3077, 4995, 8105, 13139, 21293, 34492, 55858, 90438, 146406, 236974, 383538, 620703, 1004471, 1625447, 2630249, 4256087, 6886804, 11143447, 18030911, 29175137, 47206975, 76383199, 123591458]

cp's OEIS Frontend

A289249 Number of compositions of n if only the order of parts 1 and 2 matters.

Table of values

List of values