A300419 - cp's OEIS frontend

A300419 Smallest nonnegative number k such that k can be written in exactly n ways as x^2 + xy + y^2 where x and y are positive integers, with x >= y.

n	a(n)
0	0
1	3
2	91
3	637
4	1729
5	24843
6	12103
7	405769
8	53599
9	157339
10	593047
11	59648043
12	375193
13	2989441
14	8968323
15	7709611
16	1983163
17	3360173089
18	4877509
19	2339177536969
20	18384457
21	377770939
22	146482609
23	439447827
24	13882141
25	1302924259

[0, 3, 91, 637, 1729, 24843, 12103, 405769, 53599, 157339, 593047, 59648043, 375193, 2989441, 8968323, 7709611, 1983163, 3360173089, 4877509, 2339177536969, 18384457, 377770939, 146482609, 439447827, 13882141, 1302924259]

cp's OEIS Frontend

A300419 Smallest nonnegative number k such that k can be written in exactly n ways as x^2 + xy + y^2 where x and y are positive integers, with x >= y.

Table of values

List of values