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.

A294493 a(n) = Sum_{m=0..n} 3^v3(m!), where v3(m!) is the exponent of the highest power of 3 dividing n!, expressed in base 3.

Table of values

n a(n)
0 1
1 2
2 10
3 20
4 100
5 110
6 210
7 1010
8 1110
9 11110
10 21110
11 101110
12 201110
13 1001110
14 1101110
15 2101110
16 10101110
17 11101110
18 111101110
19 211101110
20 1011101110
21 2011101110
22 10011101110
23 11011101110
24 21011101110
25 101011101110
26 111011101110
27 10111011101110
28 20111011101110

List of values

[1, 2, 10, 20, 100, 110, 210, 1010, 1110, 11110, 21110, 101110, 201110, 1001110, 1101110, 2101110, 10101110, 11101110, 111101110, 211101110, 1011101110, 2011101110, 10011101110, 11011101110, 21011101110, 101011101110, 111011101110, 10111011101110, 20111011101110]

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

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