A184177 - cp's OEIS frontend

A184177 Number of set partitions of {1,2,...,n} having no blocks of the form {i,i+1,i+2}.

n	a(n)
0	1
1	1
2	2
3	4
4	13
5	46
6	184
7	805
8	3840
9	19775
10	109180
11	642382
12	4007712
13	26399764
14	182939900
15	1329327991
16	10100670183
17	80053631844
18	660328296777
19	5657449573120
20	50255253534312
21	462096537041953
22	4391648990609487
23	43079839534282880

[1, 1, 2, 4, 13, 46, 184, 805, 3840, 19775, 109180, 642382, 4007712, 26399764, 182939900, 1329327991, 10100670183, 80053631844, 660328296777, 5657449573120, 50255253534312, 462096537041953, 4391648990609487, 43079839534282880]

cp's OEIS Frontend

A184177 Number of set partitions of {1,2,...,n} having no blocks of the form {i,i+1,i+2}.

Table of values

List of values