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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.

A367244 a(n) is the number of n-digit numbers whose difference between the largest and smallest digits is equal to 3.

Table of values

n a(n)
1 0
2 13
3 119
4 733
5 3815
6 18133
7 81599
8 354493
9 1504055
10 6278053
11 25904879
12 106011853
13 431253095
14 1746686773
15 7051884959
16 28403182813
17 114200118935
18 458563556293
19 1839545301839
20 7374058107373
21 29543870469575
22 118318410678613
23 473702458475519
24 1896096339905533
25 7588244995073015

List of values

[0, 13, 119, 733, 3815, 18133, 81599, 354493, 1504055, 6278053, 25904879, 106011853, 431253095, 1746686773, 7051884959, 28403182813, 114200118935, 458563556293, 1839545301839, 7374058107373, 29543870469575, 118318410678613, 473702458475519, 1896096339905533, 7588244995073015]

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

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