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.

A079995 Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={2}.

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 14
5 39
6 103
7 255
8 665
9 1741
10 4605
11 12046
12 31474
13 82206
14 215157
15 563083
16 1473635
17 3855111
18 10085589
19 26386595
20 69038554
21 180630858
22 472594580
23 1236463719
24 3235013481
25 8463923170
26 22144596592
27 57937977232
28 151585883920

List of values

[1, 1, 2, 4, 14, 39, 103, 255, 665, 1741, 4605, 12046, 31474, 82206, 215157, 563083, 1473635, 3855111, 10085589, 26386595, 69038554, 180630858, 472594580, 1236463719, 3235013481, 8463923170, 22144596592, 57937977232, 151585883920]

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

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