A213119 - cp's OEIS frontend

A213119 Number of binary arrays of length 2*n+1 with fewer than n ones in any length 2n subsequence (=less than 50% duty cycle).

n	a(n)
1	1
2	7
3	34
4	151
5	646
6	2710
7	11236
8	46231
9	189214
10	771442
11	3136156
12	12720982
13	51507964
14	208260556
15	841065544
16	3393346711
17	13679459854
18	55106773786
19	221860011244
20	892741834546
21	3590659699444
22	14436037598836
23	58018598086264

[1, 7, 34, 151, 646, 2710, 11236, 46231, 189214, 771442, 3136156, 12720982, 51507964, 208260556, 841065544, 3393346711, 13679459854, 55106773786, 221860011244, 892741834546, 3590659699444, 14436037598836, 58018598086264]

cp's OEIS Frontend

A213119 Number of binary arrays of length 2*n+1 with fewer than n ones in any length 2n subsequence (=less than 50% duty cycle).

Table of values

List of values