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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A275794 One half of the y members of the positive proper solutions (x = x1(n), y = y1(n)) of the first class for the Pell equation x^2 - 2*y^2 = +7^2.

Table of values

n a(n)
0 2
1 15
2 88
3 513
4 2990
5 17427
6 101572
7 592005
8 3450458
9 20110743
10 117214000
11 683173257
12 3981825542
13 23207779995
14 135264854428
15 788381346573
16 4595023225010
17 26781758003487
18 156095524795912
19 909791390771985
20 5302652819835998
21 30906125528244003

List of values

[2, 15, 88, 513, 2990, 17427, 101572, 592005, 3450458, 20110743, 117214000, 683173257, 3981825542, 23207779995, 135264854428, 788381346573, 4595023225010, 26781758003487, 156095524795912, 909791390771985, 5302652819835998, 30906125528244003]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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