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.

A120626 Least number k such that the k-th Catalan number C(2k,k)/(k+1) is divisible by n!.

Table of values

n a(n)
1 1
2 2
3 5
4 14
5 14
6 46
7 46
8 382
9 446
10 1662
11 1662
12 3582
13 3582
14 4094
15 4094
16 130942
17 130942
18 458238
19 458238
20 1040382
21 1046526
22 2883582
23 3129342
24 16760830
25 16760830
26 56623102
27 66584318
28 367001598
29 367001598
30 670826494
31 670826494
32 8589672446
33 12348030974

List of values

[1, 2, 5, 14, 14, 46, 46, 382, 446, 1662, 1662, 3582, 3582, 4094, 4094, 130942, 130942, 458238, 458238, 1040382, 1046526, 2883582, 3129342, 16760830, 16760830, 56623102, 66584318, 367001598, 367001598, 670826494, 670826494, 8589672446, 12348030974]

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

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