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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.

A376269 a(n) = n! + (n - 1)! + (n - 2)! + n - 3.

Table of values

n a(n)
2 3
3 9
4 33
5 152
6 867
7 5884
8 46085
9 408246
10 4032007
11 43908488
12 522547209
13 6745939210
14 93884313611
15 1401079680012
16 22317642547213
17 377917892352014
18 6778983923712015
19 128403161542656016
20 2560949482291200017
21 53645489280294912018
22 1177524571957493760019
23 27027108408834293760020

List of values

[3, 9, 33, 152, 867, 5884, 46085, 408246, 4032007, 43908488, 522547209, 6745939210, 93884313611, 1401079680012, 22317642547213, 377917892352014, 6778983923712015, 128403161542656016, 2560949482291200017, 53645489280294912018, 1177524571957493760019, 27027108408834293760020]

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

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