A376110 - cp's OEIS frontend

A376110 Number of permutations of {1,2,...,n} that are non-self-overlapping as Hertzsprung patterns; also called non-extendible.

n	a(n)
0	1
1	1
2	0
3	4
4	18
5	106
6	658
7	4778
8	38770
9	352458
10	3546170
11	39179282
12	471653322
13	6146403266
14	86212578962
15	1295136607114
16	20747437026442
17	353059209467042
18	6360348815730370
19	120931046165866362
20	2420054522391186274
21	50846927248165344442
22	1119121906010637564906
23	25749587951077654272898

[1, 1, 0, 4, 18, 106, 658, 4778, 38770, 352458, 3546170, 39179282, 471653322, 6146403266, 86212578962, 1295136607114, 20747437026442, 353059209467042, 6360348815730370, 120931046165866362, 2420054522391186274, 50846927248165344442, 1119121906010637564906, 25749587951077654272898]

cp's OEIS Frontend

A376110 Number of permutations of {1,2,...,n} that are non-self-overlapping as Hertzsprung patterns; also called non-extendible.

Table of values

List of values