A274544 - cp's OEIS frontend

A274544 Values of k such that 2k-1 and 5k-1 are both perfect squares.

n	a(n)
1	1
2	13
3	925
4	18241
5	1333345
6	26303005
7	1922682061
8	37928914465
9	2772506198113
10	54693468355021
11	3997952014996381
12	78867943439025313
13	5765044033118582785
14	113727519745606145821
15	8313189497804981379085
16	163995004605220623248065
17	11987613490790750030057281

[1, 13, 925, 18241, 1333345, 26303005, 1922682061, 37928914465, 2772506198113, 54693468355021, 3997952014996381, 78867943439025313, 5765044033118582785, 113727519745606145821, 8313189497804981379085, 163995004605220623248065, 11987613490790750030057281]

cp's OEIS Frontend

A274544 Values of k such that 2k-1 and 5k-1 are both perfect squares.

Table of values

List of values

cp's OEIS Frontend

A274544 Values of k such that 2*k-1 and 5*k-1 are both perfect squares.

Table of values

List of values

A274544 Values of k such that 2k-1 and 5k-1 are both perfect squares.