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.

A059517 The sequence A059515(3,n). Number of ways of placing n identifiable nonnegative intervals with a total of exactly three starting and/or finishing points.

Table of values

n a(n)
0 0
1 0
2 12
3 138
4 1056
5 7050
6 44472
7 273378
8 1659936
9 10018650
10 60289032
11 362265618
12 2175188016
13 13055911050
14 78349815192
15 470141937858
16 2820980767296
17 16926272024250
18 101558794406952
19 609356253226098
20 3656147979709776
21 21936919259318250
22 131621609699088312

List of values

[0, 0, 12, 138, 1056, 7050, 44472, 273378, 1659936, 10018650, 60289032, 362265618, 2175188016, 13055911050, 78349815192, 470141937858, 2820980767296, 16926272024250, 101558794406952, 609356253226098, 3656147979709776, 21936919259318250, 131621609699088312]

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

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