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.

A026675 a(n) = T(2n-1,n-2), T given by A026670. Also T(2n-1,n-2) = T(2n,n+2), T given by A026725 and T(2n,n-2), T given by A026736.

Table of values

n a(n)
2 1
3 6
4 29
5 131
6 575
7 2488
8 10681
9 45641
10 194467
11 827045
12 3512983
13 14909339
14 63239487
15 268127302
16 1136495965
17 4816202207
18 20406887583
19 86457399359
20 366263778659
21 1551535465465
22 6572224024539
23 27838835937511
24 117918419518219

List of values

[1, 6, 29, 131, 575, 2488, 10681, 45641, 194467, 827045, 3512983, 14909339, 63239487, 268127302, 1136495965, 4816202207, 20406887583, 86457399359, 366263778659, 1551535465465, 6572224024539, 27838835937511, 117918419518219]

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

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