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.

A202121 Number of -5..5 arrays of n elements with first, second and third differences also in -5..5.

Table of values

n a(n)
1 11
2 91
3 587
4 2833
5 14063
6 69573
7 345241
8 1713419
9 8503671
10 42203951
11 209464959
12 1039605903
13 5159703889
14 25608300207
15 127097485317
16 630802143547
17 3130756848055
18 15538372099147
19 77119055108453
20 382752363927519

List of values

[11, 91, 587, 2833, 14063, 69573, 345241, 1713419, 8503671, 42203951, 209464959, 1039605903, 5159703889, 25608300207, 127097485317, 630802143547, 3130756848055, 15538372099147, 77119055108453, 382752363927519]

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

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