A216958 - cp's OEIS frontend

A216958 Number of binary vectors v of length n with curling number 1 such that the concatenation v v with first term omitted also has curling number 1.

n	a(n)
1	2
2	2
3	4
4	6
5	10
6	20
7	36
8	72
9	142
10	280
11	560
12	1114
13	2222
14	4436
15	8864
16	17718
17	35420
18	70824
19	141624
20	283210
21	566394
22	1132728
23	2265390
24	4530726
25	9061318
26	18122518
27	36244908
28	72489566
29	144978870
30	289957490
31	579914470
32	1159828430
33	2319656332
34	4639311620
35	9278622168

[2, 2, 4, 6, 10, 20, 36, 72, 142, 280, 560, 1114, 2222, 4436, 8864, 17718, 35420, 70824, 141624, 283210, 566394, 1132728, 2265390, 4530726, 9061318, 18122518, 36244908, 72489566, 144978870, 289957490, 579914470, 1159828430, 2319656332, 4639311620, 9278622168]

cp's OEIS Frontend

A216958 Number of binary vectors v of length n with curling number 1 such that the concatenation v v with first term omitted also has curling number 1.

Table of values

List of values