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.

A249987 Number of length 7+1 0..2*n arrays with the sum of the absolute values of adjacent differences equal to 7*n.

Table of values

n a(n)
1 1012
2 31380
3 245860
4 1293326
5 4598532
6 14027522
7 35380112
8 82176822
9 170479400
10 335836428
11 613774848
12 1082535196
13 1809905436
14 2948384694
15 4614428112
16 7080133636
17 10530399420
18 15419165316
19 22022418940
20 31058475666
21 42919172164

List of values

[1012, 31380, 245860, 1293326, 4598532, 14027522, 35380112, 82176822, 170479400, 335836428, 613774848, 1082535196, 1809905436, 2948384694, 4614428112, 7080133636, 10530399420, 15419165316, 22022418940, 31058475666, 42919172164]

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

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