A340409 - cp's OEIS frontend

A340409 Number of sets of nonempty words with a total of n letters over binary alphabet such that within each word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.

n	a(n)
0	1
1	1
2	3
3	7
4	18
5	42
6	110
7	250
8	627
9	1439
10	3523
11	8063
12	19374
13	44274
14	104816
15	238976
16	559171
17	1271295
18	2946901
19	6679741
20	15363719
21	34719631
22	79335385
23	178749829
24	406164359
25	912475815
26	2063298409
27	4622461673
28	10407679805
29	23254807241
30	52160338735
31	116252939071

[1, 1, 3, 7, 18, 42, 110, 250, 627, 1439, 3523, 8063, 19374, 44274, 104816, 238976, 559171, 1271295, 2946901, 6679741, 15363719, 34719631, 79335385, 178749829, 406164359, 912475815, 2063298409, 4622461673, 10407679805, 23254807241, 52160338735, 116252939071]

cp's OEIS Frontend

A340409 Number of sets of nonempty words with a total of n letters over binary alphabet such that within each word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.

Table of values

List of values