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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.

A252863 Number of Eulerian paths in a lattice graph bounded by the four equations x+y=1, x+y=2n, x-y=2, and x-y=-2.

Table of values

n a(n)
1 1
2 16
3 304
4 5824
5 111616
6 2139136
7 40996864
8 785711104
9 15058272256
10 288594067456
11 5530948993024
12 106001474781184
13 2031534311735296
14 38934662638206976
15 746188703776374784
16 14300819473316184064
17 274077370205901684736
18 5252734292544974749696

List of values

[1, 16, 304, 5824, 111616, 2139136, 40996864, 785711104, 15058272256, 288594067456, 5530948993024, 106001474781184, 2031534311735296, 38934662638206976, 746188703776374784, 14300819473316184064, 274077370205901684736, 5252734292544974749696]

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

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