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.

A356616 Number of SAPs crossing a triangular domain of the hexagonal lattice and including top vertex.

Table of values

n a(n)
1 1
2 1
3 4
4 36
5 666
6 24696
7 1808820
8 259300148
9 72369408510
10 39205936157880
11 41152969216872016
12 83592236529606631688
13 328284931491454739745904
14 2490876950205850778116435156
15 36494758452603010620499864088198
16 1032033208911845667821292289616451218

List of values

[1, 1, 4, 36, 666, 24696, 1808820, 259300148, 72369408510, 39205936157880, 41152969216872016, 83592236529606631688, 328284931491454739745904, 2490876950205850778116435156, 36494758452603010620499864088198, 1032033208911845667821292289616451218]

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

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