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.

A200056 Number of -7..7 arrays x(0..n-1) of n elements with zero sum and elements alternately strictly increasing and strictly decreasing.

Table of values

n a(n)
1 1
2 14
3 106
4 850
5 7074
6 59910
7 514168
8 4453946
9 38855488
10 341052122
11 3006680636
12 26619825378
13 236386648574
14 2105717447626
15 18798362729604
16 168222072625668
17 1507848061916274
18 13541292792666004
19 121763260320351938

List of values

[1, 14, 106, 850, 7074, 59910, 514168, 4453946, 38855488, 341052122, 3006680636, 26619825378, 236386648574, 2105717447626, 18798362729604, 168222072625668, 1507848061916274, 13541292792666004, 121763260320351938]

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

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