A322621 - cp's OEIS frontend

A322621 E.g.f.: C(x,y) = cosh(x)cosh(y) / (1 - sinh(x)sinh(y)), where C(x,y) = Sum_{n>=0} Sum_{k=0..2n} T(n,k) x^(2n-k)y^k/(2*n)!, as a triangle of coefficients T(n,k) read by rows.

n	a(n)
0	1
1	1
2	2
3	1
4	1
5	16
6	30
7	16
8	1
9	1
10	96
11	615
12	1040
13	615
14	96
15	1
16	1
17	512
18	10220
19	43904
20	68390
21	43904
22	10220
23	512
24	1
25	1
26	2560
27	147645
28	1482240
29	4998210
30	7322112
31	4998210
32	1482240
33	147645
34	2560
35	1
36	1
37	12288
38	1948650
39	43310080
40	291662415
41	831080448
42	1161583500
43	831080448
44	291662415
45	43310080
46	1948650
47	12288
48	1
49	1
50	57344
51	24180611
52	1145417728
53	14692638961
54	75654971392
55	190145878923
56	256124504064
57	190145878923
58	75654971392
59	14692638961
60	1145417728
61	24180611
62	57344
63	1

[1, 1, 2, 1, 1, 16, 30, 16, 1, 1, 96, 615, 1040, 615, 96, 1, 1, 512, 10220, 43904, 68390, 43904, 10220, 512, 1, 1, 2560, 147645, 1482240, 4998210, 7322112, 4998210, 1482240, 147645, 2560, 1, 1, 12288, 1948650, 43310080, 291662415, 831080448, 1161583500, 831080448, 291662415, 43310080, 1948650, 12288, 1, 1, 57344, 24180611, 1145417728, 14692638961, 75654971392, 190145878923, 256124504064, 190145878923, 75654971392, 14692638961, 1145417728, 24180611, 57344, 1]

cp's OEIS Frontend

A322621 E.g.f.: C(x,y) = cosh(x)cosh(y) / (1 - sinh(x)sinh(y)), where C(x,y) = Sum_{n>=0} Sum_{k=0..2n} T(n,k) x^(2n-k)y^k/(2*n)!, as a triangle of coefficients T(n,k) read by rows.

Table of values

List of values

cp's OEIS Frontend

A322621 E.g.f.: C(x,y) = cosh(x)*cosh(y) / (1 - sinh(x)*sinh(y)), where C(x,y) = Sum_{n>=0} Sum_{k=0..2*n} T(n,k) * x^(2*n-k)*y^k/(2*n)!, as a triangle of coefficients T(n,k) read by rows.

Table of values

List of values

A322621 E.g.f.: C(x,y) = cosh(x)cosh(y) / (1 - sinh(x)sinh(y)), where C(x,y) = Sum_{n>=0} Sum_{k=0..2n} T(n,k) x^(2n-k)y^k/(2*n)!, as a triangle of coefficients T(n,k) read by rows.