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.

A324353 Total number of occurrences of 3 in the (signed) displacement sets of all permutations of [n+3] divided by 3!.

Table of values

n a(n)
0 0
1 1
2 7
3 49
4 375
5 3181
6 29843
7 307833
8 3468671
9 42432445
10 560365779
11 7948580377
12 120557659247
13 1947336998829
14 33378478735475
15 605158251430681
16 11571369420832383
17 232739737871570173
18 4912330587789969971
19 108564708629365952505
20 2507303342099915104559

List of values

[0, 1, 7, 49, 375, 3181, 29843, 307833, 3468671, 42432445, 560365779, 7948580377, 120557659247, 1947336998829, 33378478735475, 605158251430681, 11571369420832383, 232739737871570173, 4912330587789969971, 108564708629365952505, 2507303342099915104559]

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

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