A081232 - cp's OEIS frontend

A081232 Let p = n-th prime of the form 4k+1, take smallest solution (x,y) to the Pellian equation x^2 - p*y^2 = 1 with x and y >= 1; sequence gives value of x.

n	a(n)
1	9
2	649
3	33
4	9801
5	73
6	2049
7	66249
8	1766319049
9	2281249
10	500001
11	62809633
12	201
13	158070671986249
14	1204353
15	6083073
16	25801741449
17	46698728731849
18	2499849
19	2469645423824185801
20	6224323426849
21	393
22	5848201
23	1072400673

[9, 649, 33, 9801, 73, 2049, 66249, 1766319049, 2281249, 500001, 62809633, 201, 158070671986249, 1204353, 6083073, 25801741449, 46698728731849, 2499849, 2469645423824185801, 6224323426849, 393, 5848201, 1072400673]

cp's OEIS Frontend

A081232 Let p = n-th prime of the form 4k+1, take smallest solution (x,y) to the Pellian equation x^2 - p*y^2 = 1 with x and y >= 1; sequence gives value of x.

Table of values

List of values