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.

A382531 Number of n-digit base-10 numbers whose digit sum is equal to ceiling(9*n/2).

Table of values

n a(n)
1 1
2 9
3 70
4 615
5 5520
6 50412
7 468448
8 4379055
9 41395240
10 392406145
11 3748943890
12 35866068766
13 345143007910
14 3323483518810
15 32150758083580
16 311088525668335
17 3021445494584902
18 29344719005694973
19 285904843977651598
20 2785022004925340460
21 27203012941819689340

List of values

[1, 9, 70, 615, 5520, 50412, 468448, 4379055, 41395240, 392406145, 3748943890, 35866068766, 345143007910, 3323483518810, 32150758083580, 311088525668335, 3021445494584902, 29344719005694973, 285904843977651598, 2785022004925340460, 27203012941819689340]

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

Content is available under The OEIS End-User License Agreement.