A354246 - cp's OEIS frontend

A354246 Indices of coefficients of x^(2k-1) in Integral exp(-xtan(x))/cos(x) dx at which the signs of the coefficients change: list of k such that sign(A354245(k)) != sign(A354245(k-1)), starting with 1.

n	a(n)
1	1
2	2
3	5
4	10
5	18
6	29
7	42
8	57
9	75
10	95
11	118
12	143
13	171
14	201
15	234
16	269
17	307
18	347
19	390
20	435
21	482
22	532
23	585
24	639
25	697
26	757
27	819
28	884
29	951
30	1021
31	1093
32	1167
33	1245
34	1324
35	1406
36	1491
37	1578
38	1667
39	1759
40	1853
41	1950
42	2050
43	2151
44	2256
45	2362
46	2471
47	2583
48	2697
49	2814
50	2933
51	3054
52	3178
53	3305
54	3434
55	3565
56	3699
57	3835
58	3974
59	4115
60	4259
61	4405
62	4554
63	4705
64	4859

[1, 2, 5, 10, 18, 29, 42, 57, 75, 95, 118, 143, 171, 201, 234, 269, 307, 347, 390, 435, 482, 532, 585, 639, 697, 757, 819, 884, 951, 1021, 1093, 1167, 1245, 1324, 1406, 1491, 1578, 1667, 1759, 1853, 1950, 2050, 2151, 2256, 2362, 2471, 2583, 2697, 2814, 2933, 3054, 3178, 3305, 3434, 3565, 3699, 3835, 3974, 4115, 4259, 4405, 4554, 4705, 4859]

cp's OEIS Frontend

A354246 Indices of coefficients of x^(2k-1) in Integral exp(-xtan(x))/cos(x) dx at which the signs of the coefficients change: list of k such that sign(A354245(k)) != sign(A354245(k-1)), starting with 1.

Table of values

List of values

cp's OEIS Frontend

A354246 Indices of coefficients of x^(2*k-1) in Integral exp(-x*tan(x))/cos(x) dx at which the signs of the coefficients change: list of k such that sign(A354245(k)) != sign(A354245(k-1)), starting with 1.

Table of values

List of values

A354246 Indices of coefficients of x^(2k-1) in Integral exp(-xtan(x))/cos(x) dx at which the signs of the coefficients change: list of k such that sign(A354245(k)) != sign(A354245(k-1)), starting with 1.