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.

A275347 Number of nX3 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-2) and new values introduced in order 0..2.

Table of values

n a(n)
1 5
2 81
3 288
4 1024
5 4100
6 16956
7 70272
8 291320
9 1211092
10 5070832
11 21255328
12 89170864
13 374453028
14 1574982464
15 6627474512
16 27898519192
17 117476409700
18 494869331248
19 2084962994672
20 8785404327328
21 37022705828932
22 156033713723616

List of values

[5, 81, 288, 1024, 4100, 16956, 70272, 291320, 1211092, 5070832, 21255328, 89170864, 374453028, 1574982464, 6627474512, 27898519192, 117476409700, 494869331248, 2084962994672, 8785404327328, 37022705828932, 156033713723616]

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

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