A128761 - cp's OEIS frontend

A128761 Number of compositions of n with parts in N which avoid the consecutive pattern 123.

n	a(n)
0	1
1	1
2	2
3	4
4	8
5	16
6	31
7	61
8	119
9	232
10	453
11	883
12	1721
13	3354
14	6536
15	12735
16	24813
17	48344
18	94189
19	183506
20	357518
21	696534
22	1357019
23	2643798
24	5150746
25	10034865
26	19550268
27	38088486
28	74205248
29	144569092
30	281654211
31	548727863
32	1069049370
33	2082756500

[1, 1, 2, 4, 8, 16, 31, 61, 119, 232, 453, 883, 1721, 3354, 6536, 12735, 24813, 48344, 94189, 183506, 357518, 696534, 1357019, 2643798, 5150746, 10034865, 19550268, 38088486, 74205248, 144569092, 281654211, 548727863, 1069049370, 2082756500]

cp's OEIS Frontend

A128761 Number of compositions of n with parts in N which avoid the consecutive pattern 123.

Table of values

List of values