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.

A337313 a(n) is the number of n-digit positive integers with exactly three distinct base 10 digits.

Table of values

n a(n)
1 0
2 0
3 648
4 3888
5 16200
6 58320
7 195048
8 625968
9 1960200
10 6045840
11 18468648
12 56068848
13 169533000
14 511252560
15 1539065448
16 4627812528
17 13904670600
18 41756478480
19 125354369448
20 376232977008
21 1129038669000
22 3387795483600
23 10164745404648
24 30496954122288
25 91496298184200

List of values

[0, 0, 648, 3888, 16200, 58320, 195048, 625968, 1960200, 6045840, 18468648, 56068848, 169533000, 511252560, 1539065448, 4627812528, 13904670600, 41756478480, 125354369448, 376232977008, 1129038669000, 3387795483600, 10164745404648, 30496954122288, 91496298184200]

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

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