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.

A274751 Number of 4 X n 0..2 arrays with no element equal to any value at offset (-1,-2) (0,-1) or (-1,0) and new values introduced in order 0..2.

Table of values

n a(n)
1 4
2 27
3 144
4 813
5 4554
6 25585
7 143634
8 806695
9 4529786
10 25438375
11 142850048
12 802197187
13 4504820208
14 25297392889
15 142060454416
16 797757713921
17 4479903521254
18 25157436233205
19 141274594599246
20 793344420605515

List of values

[4, 27, 144, 813, 4554, 25585, 143634, 806695, 4529786, 25438375, 142850048, 802197187, 4504820208, 25297392889, 142060454416, 797757713921, 4479903521254, 25157436233205, 141274594599246, 793344420605515]

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

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