A261853 - cp's OEIS frontend

A261853 Number of compositions of n into distinct parts where each part i is marked with a word of length i over a binary alphabet whose letters appear in alphabetical order and all letters occur at least once in the composition.

n	a(n)
2	1
3	10
4	15
5	40
6	183
7	266
8	549
9	1056
10	4421
11	5850
12	12245
13	20644
14	39809
15	141818
16	195421
17	370808
18	633379
19	1126518
20	1870135
21	6531964
22	8547045
23	16324018
24	26458275
25	46612364
26	73200021
27	127916094
28	385244951
29	518151276
30	939317459
31	1516648678
32	2564211485
33	4008404972

[1, 10, 15, 40, 183, 266, 549, 1056, 4421, 5850, 12245, 20644, 39809, 141818, 195421, 370808, 633379, 1126518, 1870135, 6531964, 8547045, 16324018, 26458275, 46612364, 73200021, 127916094, 385244951, 518151276, 939317459, 1516648678, 2564211485, 4008404972]

cp's OEIS Frontend

A261853 Number of compositions of n into distinct parts where each part i is marked with a word of length i over a binary alphabet whose letters appear in alphabetical order and all letters occur at least once in the composition.

Table of values

List of values