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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.

A027572 Palindromes of form n^2 + (n+1)^2.

Table of values

n a(n)
1 1
2 5
3 181
4 313
5 545
6 1690961
7 3162613
8 3187813
9 5258525
10 5824285
11 58281418285
12 1635446445361
13 3166046406613
14 124852060258421
15 149988757889941
16 310433303334013
17 582818040818285
18 12951570707515921
19 5227371841481737225
20 5649436330336349465
21 5816694029204966185

List of values

[1, 5, 181, 313, 545, 1690961, 3162613, 3187813, 5258525, 5824285, 58281418285, 1635446445361, 3166046406613, 124852060258421, 149988757889941, 310433303334013, 582818040818285, 12951570707515921, 5227371841481737225, 5649436330336349465, 5816694029204966185]

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

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