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.

A188235 Number of nondecreasing arrangements of n numbers in -(n+6)..(n+6) with sum zero and not more than two numbers equal.

Table of values

n a(n)
1 1
2 9
3 49
4 311
5 1852
6 10994
7 64370
8 374820
9 2171675
10 12546170
11 72337436
12 416605786
13 2397909069
14 13799639040
15 79425097850
16 457295766838
17 2634229243277
18 15183632033377
19 87578564420013
20 505526226244917
21 2920309324204918

List of values

[1, 9, 49, 311, 1852, 10994, 64370, 374820, 2171675, 12546170, 72337436, 416605786, 2397909069, 13799639040, 79425097850, 457295766838, 2634229243277, 15183632033377, 87578564420013, 505526226244917, 2920309324204918]

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

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