A242526 - cp's OEIS frontend

A242526 Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at most 4.

n	a(n)
1	1
2	1
3	1
4	3
5	12
6	36
7	90
8	214
9	521
10	1335
11	3473
12	9016
13	23220
14	59428
15	152052
16	389636
17	999776
18	2566517
19	6586825
20	16899574
21	43352560
22	111213798
23	285319258
24	732016006
25	1878072638
26	4818362046
27	12361809384
28	31714901077
29	81366445061
30	208750870961

[1, 1, 1, 3, 12, 36, 90, 214, 521, 1335, 3473, 9016, 23220, 59428, 152052, 389636, 999776, 2566517, 6586825, 16899574, 43352560, 111213798, 285319258, 732016006, 1878072638, 4818362046, 12361809384, 31714901077, 81366445061, 208750870961]

cp's OEIS Frontend

A242526 Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is at most 4.

Table of values

List of values