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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.

A049212 a(n) = -Product_{k=0..n} (10*k - 1); deca-factorial numbers.

Table of values

n a(n)
0 1
1 9
2 171
3 4959
4 193401
5 9476649
6 559122291
7 38579438079
8 3047775608241
9 271252029133449
10 26853950884211451
11 2927080646379048159
12 348322596919106730921
13 44933615002564768288809
14 6245772485356502792144451
15 930620100318118916029523199
16 147968595950580907648694188641

List of values

[1, 9, 171, 4959, 193401, 9476649, 559122291, 38579438079, 3047775608241, 271252029133449, 26853950884211451, 2927080646379048159, 348322596919106730921, 44933615002564768288809, 6245772485356502792144451, 930620100318118916029523199, 147968595950580907648694188641]

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

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