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.

A219466 Number of nX3 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 nX3 array.

Table of values

n a(n)
1 10
2 68
3 673
4 5040
5 32229
6 185800
7 982456
8 4815782
9 22059734
10 95049799
11 387398157
12 1500899485
13 5551333536
14 19675267097
15 67041131529
16 220243855894
17 699365511947
18 2151361250171
19 6423848162633
20 18651881494908
21 52745972542258

List of values

[10, 68, 673, 5040, 32229, 185800, 982456, 4815782, 22059734, 95049799, 387398157, 1500899485, 5551333536, 19675267097, 67041131529, 220243855894, 699365511947, 2151361250171, 6423848162633, 18651881494908, 52745972542258]

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

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