A075577 - cp's OEIS frontend

A075577 k^2 is a term if k^2 + (k-1)^2 and k^2 + (k+1)^2 are primes.

n	a(n)
1	4
2	25
3	625
4	900
5	1225
6	4900
7	7225
8	10000
9	12100
10	50625
11	52900
12	67600
13	81225
14	84100
15	102400
16	152100
17	168100
18	225625
19	240100
20	245025
21	265225
22	348100
23	462400
24	483025
25	504100
26	562500
27	577600
28	714025
29	902500
30	1166400
31	1210000
32	1288225
33	1380625
34	1416100
35	1428025

[4, 25, 625, 900, 1225, 4900, 7225, 10000, 12100, 50625, 52900, 67600, 81225, 84100, 102400, 152100, 168100, 225625, 240100, 245025, 265225, 348100, 462400, 483025, 504100, 562500, 577600, 714025, 902500, 1166400, 1210000, 1288225, 1380625, 1416100, 1428025]

cp's OEIS Frontend

A075577 k^2 is a term if k^2 + (k-1)^2 and k^2 + (k+1)^2 are primes.

Table of values

List of values