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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.

A322052 Number of decimal strings of length n that contain a specific string xy where x and y are distinct digits.

Table of values

n a(n)
1 0
2 1
3 20
4 299
5 3970
6 49401
7 590040
8 6850999
9 77919950
10 872348501
11 9645565060
12 105583302099
13 1146187455930
14 12356291257201
15 132416725116080
16 1411810959903599
17 14985692873919910
18 158445117779295501
19 1669465484919035100
20 17536209731411055499
21 183692631829191519890
22 1919390108560504143401

List of values

[0, 1, 20, 299, 3970, 49401, 590040, 6850999, 77919950, 872348501, 9645565060, 105583302099, 1146187455930, 12356291257201, 132416725116080, 1411810959903599, 14985692873919910, 158445117779295501, 1669465484919035100, 17536209731411055499, 183692631829191519890, 1919390108560504143401]

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

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