A177259 - cp's OEIS frontend

A177259 Number of derangements of {1,2,...,n} having no adjacent 3-cycles (an adjacent 3-cycle is a cycle of the form (i,i+1,i+2)).

n	a(n)
0	1
1	0
2	1
3	1
4	9
5	41
6	258
7	1809
8	14575
9	131660
10	1320264
11	14551987
12	174887262
13	2276174790
14	31895551245
15	478783042890
16	7665081036273
17	130370168718467
18	2347620603019159
19	44620121619435141
20	892663172726141844
21	18750621868455013979
22	412602921349249182309

[1, 0, 1, 1, 9, 41, 258, 1809, 14575, 131660, 1320264, 14551987, 174887262, 2276174790, 31895551245, 478783042890, 7665081036273, 130370168718467, 2347620603019159, 44620121619435141, 892663172726141844, 18750621868455013979, 412602921349249182309]

cp's OEIS Frontend

A177259 Number of derangements of {1,2,...,n} having no adjacent 3-cycles (an adjacent 3-cycle is a cycle of the form (i,i+1,i+2)).

Table of values

List of values