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.

A275139 Number of n X 5 0..2 arrays with no element equal to any value at offset (-2,-2) (-1,-2) or (0,-1) and new values introduced in order 0..2.

Table of values

n a(n)
1 8
2 144
3 528
4 2320
5 9744
6 41360
7 175120
8 741904
9 3142672
10 13312656
11 56393232
12 238885648
13 1011935760
14 4286628752
15 18158450704
16 76920431632
17 325840177168
18 1380281140368
19 5846964738576
20 24768140094736
21 104919525117456

List of values

[8, 144, 528, 2320, 9744, 41360, 175120, 741904, 3142672, 13312656, 56393232, 238885648, 1011935760, 4286628752, 18158450704, 76920431632, 325840177168, 1380281140368, 5846964738576, 24768140094736, 104919525117456]

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

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