A353008 - cp's OEIS frontend

A353008 a(n) is the smallest positive k such that k^2 + 1 has 2*n divisors, or -1 if no such k exists.

n	a(n)
1	1
2	3
3	7
4	13
5	182
6	43
7	1068
8	47
9	268
10	443
11	15905182
12	157
13	1832311432
14	14557
15	16432
16	307
17	255250280182
18	1407
19	355101282318
20	3307
21	92682
22	3626068
23	21346690797155182
24	993
25	313932
26	120813568
27	51982
28	16693
29	982692130687379186432
30	2943
31	2444574943897581751068
32	2163

[1, 3, 7, 13, 182, 43, 1068, 47, 268, 443, 15905182, 157, 1832311432, 14557, 16432, 307, 255250280182, 1407, 355101282318, 3307, 92682, 3626068, 21346690797155182, 993, 313932, 120813568, 51982, 16693, 982692130687379186432, 2943, 2444574943897581751068, 2163]

cp's OEIS Frontend

A353008 a(n) is the smallest positive k such that k^2 + 1 has 2*n divisors, or -1 if no such k exists.

Table of values

List of values