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.

A117927 a(n) = binomial(s(n), n) where s(n) = n-th semiprime.

Table of values

n a(n)
1 4
2 15
3 84
4 210
5 2002
6 5005
7 116280
8 319770
9 2042975
10 5311735
11 193536720
12 548354040
13 1476337800
14 9669554100
15 25140840660
16 991493848554
17 6499270398159
18 27900908274925
19 280576272201225
20 1210269541711230
21 3342649210440540
22 34315056105966195
23 227068876035237600
24 2305629203680278840

List of values

[4, 15, 84, 210, 2002, 5005, 116280, 319770, 2042975, 5311735, 193536720, 548354040, 1476337800, 9669554100, 25140840660, 991493848554, 6499270398159, 27900908274925, 280576272201225, 1210269541711230, 3342649210440540, 34315056105966195, 227068876035237600, 2305629203680278840]

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

Content is available under The OEIS End-User License Agreement.