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.

A202658 Number of -2..2 arrays of n elements with first through fourth differences also in -2..2.

Table of values

n a(n)
1 5
2 19
3 57
4 127
5 213
6 363
7 613
8 1055
9 1815
10 3159
11 5503
12 9609
13 16773
14 29281
15 51125
16 89277
17 155899
18 272315
19 475793
20 831415
21 1452927
22 2539213
23 4437877
24 7756367
25 13556573
26 23694815
27 41415935
28 72391801
29 126536987
30 221182305
31 386622379

List of values

[5, 19, 57, 127, 213, 363, 613, 1055, 1815, 3159, 5503, 9609, 16773, 29281, 51125, 89277, 155899, 272315, 475793, 831415, 1452927, 2539213, 4437877, 7756367, 13556573, 23694815, 41415935, 72391801, 126536987, 221182305, 386622379]

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

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