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.

A222857 Number of nX3 0..1 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope.

Table of values

n a(n)
1 6
2 18
3 108
4 410
5 2460
6 11160
7 70818
8 346610
9 2213136
10 11587248
11 73844100
12 399763695
13 2535415632
14 14043080412
15 88488807432
16 497957337496
17 3117629380302
18 17742484266750
19 110507820665700
20 634061126810250
21 3931544430607680

List of values

[6, 18, 108, 410, 2460, 11160, 70818, 346610, 2213136, 11587248, 73844100, 399763695, 2535415632, 14043080412, 88488807432, 497957337496, 3117629380302, 17742484266750, 110507820665700, 634061126810250, 3931544430607680]

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

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