A028246 - cp's OEIS frontend

A028246 Triangular array a(n,k) = (1/k)Sum_{i=0..k} (-1)^(k-i)binomial(k,i)*i^n; n >= 1, 1 <= k <= n, read by rows.

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	2
7	1
8	7
9	12
10	6
11	1
12	15
13	50
14	60
15	24
16	1
17	31
18	180
19	390
20	360
21	120
22	1
23	63
24	602
25	2100
26	3360
27	2520
28	720
29	1
30	127
31	1932
32	10206
33	25200
34	31920
35	20160
36	5040
37	1
38	255
39	6050
40	46620
41	166824
42	317520
43	332640
44	181440
45	40320
46	1
47	511
48	18660
49	204630
50	1020600
51	2739240
52	4233600
53	3780000
54	1814400
55	362880

[1, 1, 1, 1, 3, 2, 1, 7, 12, 6, 1, 15, 50, 60, 24, 1, 31, 180, 390, 360, 120, 1, 63, 602, 2100, 3360, 2520, 720, 1, 127, 1932, 10206, 25200, 31920, 20160, 5040, 1, 255, 6050, 46620, 166824, 317520, 332640, 181440, 40320, 1, 511, 18660, 204630, 1020600, 2739240, 4233600, 3780000, 1814400, 362880]

cp's OEIS Frontend

A028246 Triangular array a(n,k) = (1/k)Sum_{i=0..k} (-1)^(k-i)binomial(k,i)*i^n; n >= 1, 1 <= k <= n, read by rows.

Table of values

List of values

cp's OEIS Frontend

A028246 Triangular array a(n,k) = (1/k)*Sum_{i=0..k} (-1)^(k-i)*binomial(k,i)*i^n; n >= 1, 1 <= k <= n, read by rows.

Table of values

List of values

A028246 Triangular array a(n,k) = (1/k)Sum_{i=0..k} (-1)^(k-i)binomial(k,i)*i^n; n >= 1, 1 <= k <= n, read by rows.