A378382 - cp's OEIS frontend

A378382 Number of maximal chains in the poset of all binary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0.

n	a(n)
0	1
1	1
2	2
3	5
4	16
5	57
6	226
7	961
8	4376
9	21041
10	106534
11	563961
12	3112924
13	17839993
14	105907946
15	649432673
16	4105783696
17	26706965985
18	178466243662
19	1223248786921
20	8589272300516
21	61708802126441
22	453143009601682
23	3397715981566545
24	25990997059282456
25	202666687407866257

[1, 1, 2, 5, 16, 57, 226, 961, 4376, 21041, 106534, 563961, 3112924, 17839993, 105907946, 649432673, 4105783696, 26706965985, 178466243662, 1223248786921, 8589272300516, 61708802126441, 453143009601682, 3397715981566545, 25990997059282456, 202666687407866257]

cp's OEIS Frontend

A378382 Number of maximal chains in the poset of all binary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0.

Table of values

List of values