A284436 - cp's OEIS frontend

A284436 The number of positive integer sequences of length n with no duplicate substrings (forward or backward) of length greater than 1, no self-adjacent terms, and a minimal product (= A282170(n)).

n	a(n)
1	1
2	2
3	6
4	2
5	18
6	12
7	24
8	24
9	792
10	240
11	1440
12	720
13	7488
14	10080
15	16992
16	40320
17	1013760
18	725760
19	979200
20	3628800
21	17902080
22	79833600
23	89510400
24	479001600
25	1988582400
26	11446272000
27	11931494400
28	108138240000
29	312309043200
30	1539772416000
31	2186163302400
32	19872992563200

[1, 2, 6, 2, 18, 12, 24, 24, 792, 240, 1440, 720, 7488, 10080, 16992, 40320, 1013760, 725760, 979200, 3628800, 17902080, 79833600, 89510400, 479001600, 1988582400, 11446272000, 11931494400, 108138240000, 312309043200, 1539772416000, 2186163302400, 19872992563200]

cp's OEIS Frontend

A284436 The number of positive integer sequences of length n with no duplicate substrings (forward or backward) of length greater than 1, no self-adjacent terms, and a minimal product (= A282170(n)).

Table of values

List of values