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.

A278803 Number of n X 4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.

Table of values

n a(n)
1 15
2 154
3 1439
4 12958
5 110455
6 870473
7 6275546
8 41370842
9 250517485
10 1402100369
11 7299678838
12 35565305995
13 163045228099
14 706720556002
15 2908736101561
16 11411036414661
17 42812862296055
18 154084456853488
19 533397095123831

List of values

[15, 154, 1439, 12958, 110455, 870473, 6275546, 41370842, 250517485, 1402100369, 7299678838, 35565305995, 163045228099, 706720556002, 2908736101561, 11411036414661, 42812862296055, 154084456853488, 533397095123831]

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

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