A105490 - cp's OEIS frontend

A105490 Number of partitions of {1...n} containing 4 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 four 2-strings.

n	a(n)
8	5
9	75
10	780
11	7105
12	61390
13	521640
14	4440870
15	38271750
16	335892150
17	3012721855
18	27672081437
19	260577574530
20	2516984551900
21	24942738309860
22	253566501600240
23	2643729700672284
24	28259635983501165
25	309569087038701420

[5, 75, 780, 7105, 61390, 521640, 4440870, 38271750, 335892150, 3012721855, 27672081437, 260577574530, 2516984551900, 24942738309860, 253566501600240, 2643729700672284, 28259635983501165, 309569087038701420]

cp's OEIS Frontend

A105490 Number of partitions of {1...n} containing 4 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 four 2-strings.

Table of values

List of values