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.

A136103 A Catalan shaped array (A000245) of least prime signatures (A025487) based on staircase Ferrers boards; cf. A136102.

Table of values

n a(n)
0 1
1 2
2 4
3 6
4 12
5 8
6 24
7 30
8 36
9 60
10 72
11 120
12 180
13 360
14 16
15 48
16 144
17 210
18 216
19 240
20 420
21 432
22 720
23 840
24 900
25 1080
26 1260
27 1680
28 1800
29 2160
30 2520
31 3600
32 5040
33 5400
34 6300
35 7560
36 10800
37 12600
38 15120
39 25200
40 37800
41 75600

List of values

[1, 2, 4, 6, 12, 8, 24, 30, 36, 60, 72, 120, 180, 360, 16, 48, 144, 210, 216, 240, 420, 432, 720, 840, 900, 1080, 1260, 1680, 1800, 2160, 2520, 3600, 5040, 5400, 6300, 7560, 10800, 12600, 15120, 25200, 37800, 75600]

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

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