A101031 - cp's OEIS frontend

A101031 Triangle read by rows: T(n,k) = (1/k) times the number of functions from an n-element set into but not onto a k-element set.

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	7
6	0
7	1
8	15
9	58
10	0
11	1
12	31
13	196
14	601
15	0
16	1
17	63
18	634
19	2765
20	7656
21	0
22	1
23	127
24	1996
25	12265
26	44136
27	116929
28	0
29	1
30	255
31	6178
32	52925
33	248016
34	803383
35	2092112
36	0
37	1
38	511
39	18916
40	223801
41	1362096
42	5432161
43	16595776
44	43006401
45	0
46	1
47	1023
48	57514
49	932525

[0, 0, 1, 0, 1, 7, 0, 1, 15, 58, 0, 1, 31, 196, 601, 0, 1, 63, 634, 2765, 7656, 0, 1, 127, 1996, 12265, 44136, 116929, 0, 1, 255, 6178, 52925, 248016, 803383, 2092112, 0, 1, 511, 18916, 223801, 1362096, 5432161, 16595776, 43006401, 0, 1, 1023, 57514, 932525]

cp's OEIS Frontend

A101031 Triangle read by rows: T(n,k) = (1/k) times the number of functions from an n-element set into but not onto a k-element set.

Table of values

List of values