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.

A084868 Main diagonal of symmetric square table A084867, in which the antidiagonal sums (A006012) form the first row shifted left.

Table of values

n a(n)
0 1
1 2
2 8
3 36
4 168
5 796
6 3800
7 18216
8 87536
9 421292
10 2029592
11 9784088
12 47187536
13 227651352
14 1098523504
15 5301727824
16 25590307552
17 123529362124
18 596337248024
19 2878947861432
20 13899229883024
21 67105641925064
22 323993230750672

List of values

[1, 2, 8, 36, 168, 796, 3800, 18216, 87536, 421292, 2029592, 9784088, 47187536, 227651352, 1098523504, 5301727824, 25590307552, 123529362124, 596337248024, 2878947861432, 13899229883024, 67105641925064, 323993230750672]

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

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