A322770 - cp's OEIS frontend

A322770 Array read by upwards antidiagonals: T(m,n) = number of set partitions into distinct parts of the multiset consisting of one copy each of x_1, x_2, ..., x_m, and two copies each of y_1, y_2, ..., y_n, for m >= 0, n >= 0.

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	5
6	5
7	9
8	18
9	40
10	15
11	31
12	70
13	172
14	457
15	52
16	120
17	299
18	801
19	2295
20	6995
21	203
22	514
23	1393
24	4025
25	12347
26	40043
27	136771
28	877
29	2407
30	7023
31	21709
32	70843
33	243235
34	875936
35	3299218
36	4140
37	12205
38	38043
39	124997
40	431636
41	1562071
42	5908978
43	23308546
44	95668354

[1, 1, 1, 2, 3, 5, 5, 9, 18, 40, 15, 31, 70, 172, 457, 52, 120, 299, 801, 2295, 6995, 203, 514, 1393, 4025, 12347, 40043, 136771, 877, 2407, 7023, 21709, 70843, 243235, 875936, 3299218, 4140, 12205, 38043, 124997, 431636, 1562071, 5908978, 23308546, 95668354]

cp's OEIS Frontend

A322770 Array read by upwards antidiagonals: T(m,n) = number of set partitions into distinct parts of the multiset consisting of one copy each of x_1, x_2, ..., x_m, and two copies each of y_1, y_2, ..., y_n, for m >= 0, n >= 0.

Table of values

List of values