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.

A280855 Number of nX4 0..2 arrays with no element equal to more than one of its king-move neighbors and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 11
2 110
3 96
4 124
5 216
6 462
7 1005
8 2010
9 3907
10 7756
11 15749
12 31804
13 63463
14 126758
15 254453
16 511180
17 1024877
18 2052836
19 4115191
20 8254198
21 16552251
22 33182160
23 66522097
24 133381078
25 267442273
26 536212952
27 1075064777
28 2155474072
29 4321733703

List of values

[11, 110, 96, 124, 216, 462, 1005, 2010, 3907, 7756, 15749, 31804, 63463, 126758, 254453, 511180, 1024877, 2052836, 4115191, 8254198, 16552251, 33182160, 66522097, 133381078, 267442273, 536212952, 1075064777, 2155474072, 4321733703]

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

Content is available under The OEIS End-User License Agreement.