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.

A180003 Place a(n) blue and b(n) (A180002) red balls in an urn, draw 5 balls without replacement; Probability(5 red balls) = Probability(3 red and 2 blue balls).

Table of values

n a(n)
1 1
2 2
3 7
4 13
5 56
6 247
7 475
8 2108
9 9361
10 18019
11 80030
12 355453
13 684229
14 3039014
15 13497835
16 25982665
17 115402484
18 512562259
19 986657023
20 4382255360
21 19463867989
22 37466984191
23 166410301178
24 739114421305
25 1422758742217
26 6319209189386

List of values

[1, 2, 7, 13, 56, 247, 475, 2108, 9361, 18019, 80030, 355453, 684229, 3039014, 13497835, 25982665, 115402484, 512562259, 986657023, 4382255360, 19463867989, 37466984191, 166410301178, 739114421305, 1422758742217, 6319209189386]

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

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