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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.

A208174 Number of nX7 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors.

Table of values

n a(n)
1 715
2 7594479
3 84091222866
4 931104734002155
5 10309684155118737894
6 114154269785454920027391
7 1263976383376771173195964686
8 13995414281804368959953485044237
9 154964620775524737157861783733965485

List of values

[715, 7594479, 84091222866, 931104734002155, 10309684155118737894, 114154269785454920027391, 1263976383376771173195964686, 13995414281804368959953485044237, 154964620775524737157861783733965485]

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

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