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.

A250648 Number of length 4+1 0..n arrays with the sum of the maximum of each adjacent pair multiplied by some arrangement of +-1 equal to zero.

Table of values

n a(n)
1 20
2 125
3 476
4 1293
5 2954
6 5901
7 10766
8 18305
9 29478
10 45361
11 67364
12 96961
13 135976
14 186445
15 250688
16 331213
17 431054
18 553277
19 701474
20 879553
21 1091754
22 1342593
23 1637320
24 1981153
25 2380028
26 2840317
27 3368740
28 3972397
29 4659346
30 5437517
31 6315766

List of values

[20, 125, 476, 1293, 2954, 5901, 10766, 18305, 29478, 45361, 67364, 96961, 135976, 186445, 250688, 331213, 431054, 553277, 701474, 879553, 1091754, 1342593, 1637320, 1981153, 2380028, 2840317, 3368740, 3972397, 4659346, 5437517, 6315766]