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.

A297677 Number of n X 3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1's.

Table of values

n a(n)
1 7
2 29
3 150
4 742
5 3744
6 18840
7 94891
8 477850
9 2406649
10 12120617
11 61043229
12 307433020
13 1548331209
14 7797889752
15 39272660089
16 197789648884
17 996131790595
18 5016837561113
19 25266394843590
20 127249627060291
21 640869727748787

List of values

[7, 29, 150, 742, 3744, 18840, 94891, 477850, 2406649, 12120617, 61043229, 307433020, 1548331209, 7797889752, 39272660089, 197789648884, 996131790595, 5016837561113, 25266394843590, 127249627060291, 640869727748787]

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

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