A114903 - cp's OEIS frontend

A114903 Number of compositions of {1,..,n} such that no two adjacent parts are of equal size (labeled Carlitz compositions), allowing parts to be of size 0.

n	a(n)
0	2
1	4
2	12
3	76
4	572
5	5204
6	59340
7	782996
8	11707324
9	197988340
10	3720933092
11	76811352116
12	1730660689580
13	42251140165108
14	1110607948991028
15	31279537587370916
16	939737174809843644
17	29996522608581396788
18	1013814287146517455812
19	36168456215193554061044

[2, 4, 12, 76, 572, 5204, 59340, 782996, 11707324, 197988340, 3720933092, 76811352116, 1730660689580, 42251140165108, 1110607948991028, 31279537587370916, 939737174809843644, 29996522608581396788, 1013814287146517455812, 36168456215193554061044]

cp's OEIS Frontend

A114903 Number of compositions of {1,..,n} such that no two adjacent parts are of equal size (labeled Carlitz compositions), allowing parts to be of size 0.

Table of values

List of values