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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.

A385912 A diagonal (unsigned) of triangle A385910; a(n) = -A385910(n+2,n) for n >= 1.

Table of values

n a(n)
1 1
2 8
3 49
4 296
5 1815
6 11284
7 70924
8 449616
9 2869779
10 18418400
11 118749345
12 768537120
13 4990021764
14 32489701776
15 212048505160
16 1386886206112
17 9087724409547
18 59646983740680
19 392071446052195
20 2580601721867400
21 17005938279649935
22 112190574812699460
23 740878216459158960
24 4897062582469861440
25 32395964187696107700

List of values

[1, 8, 49, 296, 1815, 11284, 70924, 449616, 2869779, 18418400, 118749345, 768537120, 4990021764, 32489701776, 212048505160, 1386886206112, 9087724409547, 59646983740680, 392071446052195, 2580601721867400, 17005938279649935, 112190574812699460, 740878216459158960, 4897062582469861440, 32395964187696107700]

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

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