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.

A184369 1/3 the number of (n+1) X 3 0..2 arrays with every 2 X 2 subblock having at least two equal elements connected horizontally or vertically.

Table of values

n a(n)
1 153
2 2755
3 49235
4 880781
5 15754461
6 281803871
7 5040682279
8 90163722073
9 1612776998193
10 28848073268443
11 516011408652059
12 9230001997285733
13 165098940527912805
14 2953158641948611223
15 52823754874667184367

List of values

[153, 2755, 49235, 880781, 15754461, 281803871, 5040682279, 90163722073, 1612776998193, 28848073268443, 516011408652059, 9230001997285733, 165098940527912805, 2953158641948611223, 52823754874667184367]

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

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