A001938 - cp's OEIS frontend

A001938 Expansion of k/(4*q^(1/2)) in powers of q, where k defined by sqrt(k) = theta_2(0, q)/theta_3(0, q).

n	a(n)
0	1
1	-4
2	14
3	-40
4	101
5	-236
6	518
7	-1080
8	2162
9	-4180
10	7840
11	-14328
12	25591
13	-44776
14	76918
15	-129952
16	216240
17	-354864
18	574958
19	-920600
20	1457946
21	-2285452
22	3548550
23	-5460592
24	8332425
25	-12614088
26	18953310
27	-28276968
28	41904208
29	-61702876
30	90304598
31	-131399624

[1, -4, 14, -40, 101, -236, 518, -1080, 2162, -4180, 7840, -14328, 25591, -44776, 76918, -129952, 216240, -354864, 574958, -920600, 1457946, -2285452, 3548550, -5460592, 8332425, -12614088, 18953310, -28276968, 41904208, -61702876, 90304598, -131399624]

cp's OEIS Frontend

A001938 Expansion of k/(4*q^(1/2)) in powers of q, where k defined by sqrt(k) = theta_2(0, q)/theta_3(0, q).

Table of values

List of values