A171683 - cp's OEIS frontend

A171683 Triangle T(n,k) which contains 4n!2^floor((n+1)/2) times the coefficient [t^n x^k] exp(tx)/(3 + exp(2t)) in row n, column k.

n	a(n)
0	1
1	-1
2	2
3	-1
4	-2
5	2
6	1
7	-6
8	-6
9	4
10	10
11	4
12	-12
13	-8
14	4
15	26
16	100
17	20
18	-40
19	-20
20	8
21	-154
22	156
23	300
24	40
25	-60
26	-24
27	8
28	-1646
29	-2156
30	1092
31	1400
32	140
33	-168
34	-56
35	16
36	1000
37	-13168
38	-8624
39	2912
40	2800
41	224
42	-224
43	-64
44	16
45	92744
46	18000
47	-118512
48	-51744
49	13104
50	10080
51	672
52	-576
53	-144
54	32

[1, -1, 2, -1, -2, 2, 1, -6, -6, 4, 10, 4, -12, -8, 4, 26, 100, 20, -40, -20, 8, -154, 156, 300, 40, -60, -24, 8, -1646, -2156, 1092, 1400, 140, -168, -56, 16, 1000, -13168, -8624, 2912, 2800, 224, -224, -64, 16, 92744, 18000, -118512, -51744, 13104, 10080, 672, -576, -144, 32]

cp's OEIS Frontend

A171683 Triangle T(n,k) which contains 4n!2^floor((n+1)/2) times the coefficient [t^n x^k] exp(tx)/(3 + exp(2t)) in row n, column k.

Table of values

List of values

cp's OEIS Frontend

A171683 Triangle T(n,k) which contains 4*n!*2^floor((n+1)/2) times the coefficient [t^n x^k] exp(t*x)/(3 + exp(2*t)) in row n, column k.

Table of values

List of values

A171683 Triangle T(n,k) which contains 4n!2^floor((n+1)/2) times the coefficient [t^n x^k] exp(tx)/(3 + exp(2t)) in row n, column k.