A199220 - cp's OEIS frontend

A199220 Triangle read by rows: T(n,k) = (n-1-k)*abs(s(n,n+1-k)), where s(n,k) are the signed Stirling numbers of the first kind and 1 <= k <= n.

n	a(n)
1	-1
2	0
3	-1
4	1
5	0
6	-2
7	2
8	6
9	0
10	-6
11	3
12	20
13	35
14	0
15	-24
16	4
17	45
18	170
19	225
20	0
21	-120
22	5
23	84
24	525
25	1470
26	1624
27	0
28	-720
29	6
30	140
31	1288
32	5880
33	13538
34	13132
35	0
36	-5040
37	7
38	216
39	2730
40	18144
41	67347
42	134568
43	118124
44	0
45	-40320
46	8
47	315
48	5220
49	47250
50	253092
51	807975
52	1447360
53	1172700
54	0
55	-362880
56	9
57	440
58	9240
59	108900
60	788865
61	3608220
62	10250790
63	16819000
64	12753576
65	0
66	-3628800

[-1, 0, -1, 1, 0, -2, 2, 6, 0, -6, 3, 20, 35, 0, -24, 4, 45, 170, 225, 0, -120, 5, 84, 525, 1470, 1624, 0, -720, 6, 140, 1288, 5880, 13538, 13132, 0, -5040, 7, 216, 2730, 18144, 67347, 134568, 118124, 0, -40320, 8, 315, 5220, 47250, 253092, 807975, 1447360, 1172700, 0, -362880, 9, 440, 9240, 108900, 788865, 3608220, 10250790, 16819000, 12753576, 0, -3628800]

cp's OEIS Frontend

A199220 Triangle read by rows: T(n,k) = (n-1-k)*abs(s(n,n+1-k)), where s(n,k) are the signed Stirling numbers of the first kind and 1 <= k <= n.

Table of values

List of values