cp's OEIS Frontend

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.

A309779 Squares that can be expressed as the sum of two positive squares but not as the sum of three positive squares.

Table of values

n a(n)
1 25
2 100
3 400
4 1600
5 6400
6 25600
7 102400
8 409600
9 1638400
10 6553600
11 26214400
12 104857600
13 419430400
14 1677721600
15 6710886400
16 26843545600
17 107374182400
18 429496729600
19 1717986918400
20 6871947673600
21 27487790694400
22 109951162777600
23 439804651110400
24 1759218604441600

List of values

[25, 100, 400, 1600, 6400, 25600, 102400, 409600, 1638400, 6553600, 26214400, 104857600, 419430400, 1677721600, 6710886400, 26843545600, 107374182400, 429496729600, 1717986918400, 6871947673600, 27487790694400, 109951162777600, 439804651110400, 1759218604441600]

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

Content is available under The OEIS End-User License Agreement.