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.

A247215 Integers k such that 3k+1 and 6k+1 are both squares.

Table of values

n a(n)
1 0
2 8
3 280
4 9520
5 323408
6 10986360
7 373212840
8 12678250208
9 430687294240
10 14630689753960
11 497012764340408
12 16883803297819920
13 573552299361536880
14 19483894374994434008
15 661878856450449219400
16 22484397224940279025600
17 763807626791519037651008

List of values

[0, 8, 280, 9520, 323408, 10986360, 373212840, 12678250208, 430687294240, 14630689753960, 497012764340408, 16883803297819920, 573552299361536880, 19483894374994434008, 661878856450449219400, 22484397224940279025600, 763807626791519037651008]

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

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