A318727 - cp's OEIS frontend

A318727 Number of integer compositions of n where adjacent parts are indivisible (either way) and the last and first part are also indivisible (either way).

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	5
8	3
9	5
10	13
11	9
12	23
13	15
14	37
15	45
16	63
17	115
18	131
19	207
20	265
21	415
22	603
23	823
24	1251
25	1673
26	2521
27	3519
28	5147
29	7409
30	10449
31	15225
32	21497
33	31285
34	44719
35	64171
36	92315
37	131619
38	190085
39	271871
40	391189
41	560979
42	804265
43	1155977
44	1656429
45	2381307
46	3414847

[1, 1, 1, 1, 3, 1, 5, 3, 5, 13, 9, 23, 15, 37, 45, 63, 115, 131, 207, 265, 415, 603, 823, 1251, 1673, 2521, 3519, 5147, 7409, 10449, 15225, 21497, 31285, 44719, 64171, 92315, 131619, 190085, 271871, 391189, 560979, 804265, 1155977, 1656429, 2381307, 3414847]

cp's OEIS Frontend

A318727 Number of integer compositions of n where adjacent parts are indivisible (either way) and the last and first part are also indivisible (either way).

Table of values

List of values