A293625 - cp's OEIS frontend

A293625 Generators of Fermat pseudoprimes to base 2 that are square pyramidal numbers: numbers k such that 12k+1, 18k+1 and 36*k+1 are all primes.

n	a(n)
1	1
2	15
3	45
4	56
5	71
6	85
7	121
8	141
9	155
10	176
11	185
12	206
13	255
14	275
15	301
16	346
17	350
18	380
19	401
20	470
21	506
22	511
23	540
24	680
25	710
26	745
27	786
28	801
29	871
30	946
31	1025
32	1156
33	1200
34	1211
35	1326
36	1380
37	1395
38	1421
39	1480
40	1505
41	1515
42	1590
43	1676
44	1696
45	1710
46	1830
47	1941
48	2066
49	2171

[1, 15, 45, 56, 71, 85, 121, 141, 155, 176, 185, 206, 255, 275, 301, 346, 350, 380, 401, 470, 506, 511, 540, 680, 710, 745, 786, 801, 871, 946, 1025, 1156, 1200, 1211, 1326, 1380, 1395, 1421, 1480, 1505, 1515, 1590, 1676, 1696, 1710, 1830, 1941, 2066, 2171]

cp's OEIS Frontend

A293625 Generators of Fermat pseudoprimes to base 2 that are square pyramidal numbers: numbers k such that 12k+1, 18k+1 and 36*k+1 are all primes.

Table of values

List of values

cp's OEIS Frontend

A293625 Generators of Fermat pseudoprimes to base 2 that are square pyramidal numbers: numbers k such that 12*k+1, 18*k+1 and 36*k+1 are all primes.

Table of values

List of values

A293625 Generators of Fermat pseudoprimes to base 2 that are square pyramidal numbers: numbers k such that 12k+1, 18k+1 and 36*k+1 are all primes.