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.

A275224 Number of nX4 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 14
2 216
3 339
4 1302
5 6448
6 32388
7 164645
8 844176
9 4319300
10 22083548
11 112975642
12 578036947
13 2957212295
14 15128798774
15 77399122215
16 395975649916
17 2025811842566
18 10364054079218
19 53022552043867
20 271263640161978
21 1387785882638203

List of values

[14, 216, 339, 1302, 6448, 32388, 164645, 844176, 4319300, 22083548, 112975642, 578036947, 2957212295, 15128798774, 77399122215, 395975649916, 2025811842566, 10364054079218, 53022552043867, 271263640161978, 1387785882638203]

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

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