A213120 - cp's OEIS frontend

A213120 Number of binary arrays of length 2*n+2 with fewer than n ones in any length 2n subsequence (=less than 50% duty cycle).

n	a(n)
1	1
2	10
3	54
4	252
5	1110
6	4748
7	19964
8	83024
9	342678
10	1406748
11	5751636
12	23443240
13	95319484
14	386805112
15	1567130168
16	6340730552
17	25626393878
18	103472018492
19	417449893988
20	1682982404072
21	6780908053268
22	27306234108392
23	109907864408648

[1, 10, 54, 252, 1110, 4748, 19964, 83024, 342678, 1406748, 5751636, 23443240, 95319484, 386805112, 1567130168, 6340730552, 25626393878, 103472018492, 417449893988, 1682982404072, 6780908053268, 27306234108392, 109907864408648]

cp's OEIS Frontend

A213120 Number of binary arrays of length 2*n+2 with fewer than n ones in any length 2n subsequence (=less than 50% duty cycle).

Table of values

List of values