A105489 - cp's OEIS frontend

A105489 Number of partitions of {1...n} containing 3 detached pairs of consecutive integers, i.e., partitions in which only 1- or 2-strings of consecutive integers can appear in a block and there are exactly three 2-strings.

n	a(n)
6	2
7	20
8	150
9	1040
10	7105
11	49112
12	347760
13	2537640
14	19135875
15	149285400
16	1205088742
17	10062575068
18	86859191510
19	774456785200
20	7126496659960
21	67617733760064
22	660932425168071
23	6649326113764980
24	68793130453044760
25	731299516881396540

[2, 20, 150, 1040, 7105, 49112, 347760, 2537640, 19135875, 149285400, 1205088742, 10062575068, 86859191510, 774456785200, 7126496659960, 67617733760064, 660932425168071, 6649326113764980, 68793130453044760, 731299516881396540]

cp's OEIS Frontend

A105489 Number of partitions of {1...n} containing 3 detached pairs of consecutive integers, i.e., partitions in which only 1- or 2-strings of consecutive integers can appear in a block and there are exactly three 2-strings.

Table of values

List of values