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.

A255381 Number of strings of k+n decimal digits that contain one string of exactly k consecutive "0" digits, where k >= n.

Table of values

n a(n)
0 1
1 18
2 261
3 3420
4 42300
5 504000
6 5850000
7 66600000
8 747000000
9 8280000000
10 90900000000
11 990000000000
12 10710000000000
13 115200000000000
14 1233000000000000
15 13140000000000000
16 139500000000000000
17 1476000000000000000
18 15570000000000000000
19 163800000000000000000

List of values

[1, 18, 261, 3420, 42300, 504000, 5850000, 66600000, 747000000, 8280000000, 90900000000, 990000000000, 10710000000000, 115200000000000, 1233000000000000, 13140000000000000, 139500000000000000, 1476000000000000000, 15570000000000000000, 163800000000000000000]

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

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