A374159 - cp's OEIS frontend

A374159 a(n) is the smallest nonnegative integer k where exactly n pairs of positive integers (x, y) exist such that x^2 + 7*y^2 = k.

n	a(n)
0	0
1	8
2	32
3	128
4	352
5	704
6	1408
7	2816
8	5632
9	11264
10	16192
11	45056
12	32384
13	123904
14	64768
15	178112
16	129536
17	2883584
18	259072
19	1982464
20	469568
21	712448
22	1036288
23	184549376
24	939136
25	21551552
26	4145152
27	2849792
28	1878272

[0, 8, 32, 128, 352, 704, 1408, 2816, 5632, 11264, 16192, 45056, 32384, 123904, 64768, 178112, 129536, 2883584, 259072, 1982464, 469568, 712448, 1036288, 184549376, 939136, 21551552, 4145152, 2849792, 1878272]

cp's OEIS Frontend

A374159 a(n) is the smallest nonnegative integer k where exactly n pairs of positive integers (x, y) exist such that x^2 + 7*y^2 = k.

Table of values

List of values