A209486 - cp's OEIS frontend

A209486 Number of 5-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.

n	a(n)
1	4
2	38
3	140
4	390
5	866
6	1702
7	3014
8	4984
9	7774
10	11620
11	16716
12	23352
13	31768
14	42302
15	55232
16	70950
17	89774
18	112150
19	138434
20	169120
21	204610
22	245452
23	292080
24	345096
25	404980
26	472382
27	547820
28	631998
29	725474
30	829006
31	943190
32	1068832
33	1206574

[4, 38, 140, 390, 866, 1702, 3014, 4984, 7774, 11620, 16716, 23352, 31768, 42302, 55232, 70950, 89774, 112150, 138434, 169120, 204610, 245452, 292080, 345096, 404980, 472382, 547820, 631998, 725474, 829006, 943190, 1068832, 1206574]

cp's OEIS Frontend

A209486 Number of 5-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero and avoiding the patterns z z+1 z+2 and z z-1 z-2.

Table of values

List of values