A317880 - cp's OEIS frontend

A317880 Number of series-reduced free pure symmetric identity multifunctions (with empty expressions allowed) with one atom and n positions.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	4
7	8
8	16
9	33
10	70
11	152
12	333
13	735
14	1635
15	3668
16	8285
17	18823
18	42970
19	98535
20	226870
21	524290
22	1215641
23	2827203
24	6593432
25	15416197
26	36129894
27	84860282
28	199719932
29	470930802
30	1112388190
31	2631903295
32	6236669381
33	14800078408
34	35169529363
35	83680908692

[1, 1, 1, 1, 2, 4, 8, 16, 33, 70, 152, 333, 735, 1635, 3668, 8285, 18823, 42970, 98535, 226870, 524290, 1215641, 2827203, 6593432, 15416197, 36129894, 84860282, 199719932, 470930802, 1112388190, 2631903295, 6236669381, 14800078408, 35169529363, 83680908692]

cp's OEIS Frontend

A317880 Number of series-reduced free pure symmetric identity multifunctions (with empty expressions allowed) with one atom and n positions.

Table of values

List of values