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.

A280856 Number of nX5 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 30
2 442
3 256
4 216
5 282
6 491
7 968
8 1857
9 3220
10 5281
11 8574
12 14339
13 24694
14 42833
15 73650
16 125361
17 212438
18 360727
19 614668
20 1049609
21 1791800
22 3055487
23 5205640
24 8868669
25 15113516
26 25765385
27 43926544
28 74885231
29 127643494
30 217567203
31 370837946

List of values

[30, 442, 256, 216, 282, 491, 968, 1857, 3220, 5281, 8574, 14339, 24694, 42833, 73650, 125361, 212438, 360727, 614668, 1049609, 1791800, 3055487, 5205640, 8868669, 15113516, 25765385, 43926544, 74885231, 127643494, 217567203, 370837946]

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

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