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.

A245428 Number of nonnegative integers with property that their base 10/3 expansion (see A024658) has n digits.

Table of values

n a(n)
1 10
2 30
3 100
4 330
5 1100
6 3670
7 12230
8 40770
9 135900
10 453000
11 1510000
12 5033330
13 16777770
14 55925900
15 186419660
16 621398870
17 2071329570
18 6904431900
19 23014773000
20 76715910000
21 255719700000
22 852399000000
23 2841330000000
24 9471100000000
25 31570333333330
26 105234444444430

List of values

[10, 30, 100, 330, 1100, 3670, 12230, 40770, 135900, 453000, 1510000, 5033330, 16777770, 55925900, 186419660, 621398870, 2071329570, 6904431900, 23014773000, 76715910000, 255719700000, 852399000000, 2841330000000, 9471100000000, 31570333333330, 105234444444430]