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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.

A189433 Number of n X 7 array permutations with each element not moving, or moving one space N, SW or SE.

Table of values

n a(n)
1 1
2 21
3 441
4 10069
5 278105
6 6944573
7 181540773
8 4742833745
9 124239687001
10 3261208487441
11 85625162598265
12 2250063012268697
13 59139108575177913
14 1554641730277194809
15 40872537373376873929
16 1074626580793742218601

List of values

[1, 21, 441, 10069, 278105, 6944573, 181540773, 4742833745, 124239687001, 3261208487441, 85625162598265, 2250063012268697, 59139108575177913, 1554641730277194809, 40872537373376873929, 1074626580793742218601]

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

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