A194721 - cp's OEIS frontend

A194721 Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting nine doublets into the initially empty word.

n	a(n)
0	0
1	1
2	24310
3	2699837
4	52955950
5	464221105
6	2561439806
7	10466643805
8	34648845862
9	98156060225
10	246643289830
11	563506356061
12	1191627482750
13	2363434581937
14	4441172224750
15	7969478316605
16	13742556531766
17	22888430598145
18	36972962559062
19	58126513174525
20	89196318660430

[0, 1, 24310, 2699837, 52955950, 464221105, 2561439806, 10466643805, 34648845862, 98156060225, 246643289830, 563506356061, 1191627482750, 2363434581937, 4441172224750, 7969478316605, 13742556531766, 22888430598145, 36972962559062, 58126513174525, 89196318660430]

cp's OEIS Frontend

A194721 Number of n-ary words beginning with the first character of the alphabet, that can be built by inserting nine doublets into the initially empty word.

Table of values

List of values