A235381 - cp's OEIS frontend

A235381 Positive numbers n such that n^2 + n + 41 is composite and there are no positive integers c or d such that n = cdx^2 + ((d-2)c + 1)x + ((41d^2 - d + 1)c -1)/d for an integer x.

n	a(n)
1	611
2	622
3	630
4	663
5	679
6	734
7	758
8	835
9	867
10	966
11	978
12	995
13	1006
14	1009
15	1060
16	1088
17	1127
18	1142
19	1157
20	1173
21	1175
22	1183
23	1228
24	1280
25	1345
26	1355
27	1368
28	1388
29	1390
30	1426
31	1433
32	1455
33	1457
34	1467
35	1497
36	1538
37	1539
38	1543
39	1554
40	1578
41	1603
42	1612
43	1613
44	1630
45	1661

[611, 622, 630, 663, 679, 734, 758, 835, 867, 966, 978, 995, 1006, 1009, 1060, 1088, 1127, 1142, 1157, 1173, 1175, 1183, 1228, 1280, 1345, 1355, 1368, 1388, 1390, 1426, 1433, 1455, 1457, 1467, 1497, 1538, 1539, 1543, 1554, 1578, 1603, 1612, 1613, 1630, 1661]

cp's OEIS Frontend

A235381 Positive numbers n such that n^2 + n + 41 is composite and there are no positive integers c or d such that n = cdx^2 + ((d-2)c + 1)x + ((41d^2 - d + 1)c -1)/d for an integer x.

Table of values

List of values

cp's OEIS Frontend

A235381 Positive numbers n such that n^2 + n + 41 is composite and there are no positive integers c or d such that n = c*d*x^2 + ((d-2)*c + 1)*x + ((41*d^2 - d + 1)*c -1)/d for an integer x.

Table of values

List of values

A235381 Positive numbers n such that n^2 + n + 41 is composite and there are no positive integers c or d such that n = cdx^2 + ((d-2)c + 1)x + ((41d^2 - d + 1)c -1)/d for an integer x.