A105488 - cp's OEIS frontend

A105488 Number of partitions of {1...n} containing 2 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 two 2-strings.

n	a(n)
4	1
5	6
6	30
7	150
8	780
9	4263
10	24556
11	149040
12	951615
13	6378625
14	44785620
15	328660566
16	2515643767
17	20044428810
18	165955025400
19	1425299331992
20	12678325080012
21	116635133853189
22	1108221018960830
23	10862073229428120
24	109694927532209481
25	1140199081827172719

[1, 6, 30, 150, 780, 4263, 24556, 149040, 951615, 6378625, 44785620, 328660566, 2515643767, 20044428810, 165955025400, 1425299331992, 12678325080012, 116635133853189, 1108221018960830, 10862073229428120, 109694927532209481, 1140199081827172719]

cp's OEIS Frontend

A105488 Number of partitions of {1...n} containing 2 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 two 2-strings.

Table of values

List of values