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.

A268450 Number of length-n 0..n arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.

Table of values

n a(n)
1 2
2 9
3 61
4 581
5 7160
6 108032
7 1926444
8 39616567
9 922677334
10 24000231919
11 689530024294
12 21683683196634
13 740776505063512
14 27318331535557441
15 1081605306266896792
16 45759587251345781091
17 2060162120919764963754

List of values

[2, 9, 61, 581, 7160, 108032, 1926444, 39616567, 922677334, 24000231919, 689530024294, 21683683196634, 740776505063512, 27318331535557441, 1081605306266896792, 45759587251345781091, 2060162120919764963754]

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

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