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.

A278258 Least number with the prime signature of the n-th Catalan number.

Table of values

n a(n)
0 1
1 1
2 2
3 2
4 6
5 30
6 60
7 30
8 210
9 210
10 420
11 2310
12 4620
13 13860
14 360360
15 60060
16 1021020
17 9699690
18 58198140
19 223092870
20 446185740
21 446185740
22 892371480
23 1338557220
24 1338557220
25 6692786100
26 2677114440
27 12939386460
28 802241960520
29 802241960520
30 1604483921040
31 200560490130
32 14841476269620
33 608500527054420
34 608500527054420
35 304250263527210
36 608500527054420
37 608500527054420

List of values

[1, 1, 2, 2, 6, 30, 60, 30, 210, 210, 420, 2310, 4620, 13860, 360360, 60060, 1021020, 9699690, 58198140, 223092870, 446185740, 446185740, 892371480, 1338557220, 1338557220, 6692786100, 2677114440, 12939386460, 802241960520, 802241960520, 1604483921040, 200560490130, 14841476269620, 608500527054420, 608500527054420, 304250263527210, 608500527054420, 608500527054420]

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

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