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.

A249005 Number of length 4+4 0..n arrays with no five consecutive terms having two times the sum of any three elements equal to three times the sum of the remaining two.

Table of values

n a(n)
1 216
2 2802
3 28240
4 172888
5 822348
6 2865126
7 8902860
8 23177368
9 55906496
10 122921570
11 254998668
12 492803174
13 916912140
14 1618570176
15 2775224082
16 4580364152
17 7372967710
18 11513855042
19 17636594106
20 26371506592
21 38792087628

List of values

[216, 2802, 28240, 172888, 822348, 2865126, 8902860, 23177368, 55906496, 122921570, 254998668, 492803174, 916912140, 1618570176, 2775224082, 4580364152, 7372967710, 11513855042, 17636594106, 26371506592, 38792087628]

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

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