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.

A277513 Irregular triangle read by rows: T(n,k) is the number of integers greater than 4 such that they have n trits and 2k+1 (k>=1) nonzero trits in their balanced ternary representation, with n>=3 and 1<=k<=(j-1)/2.

Table of values

n a(n)
3 4
4 12
5 24
6 16
7 40
8 80
9 60
10 240
11 64
12 84
13 560
14 448
15 112
16 1120
17 1792
18 256
19 144
20 2016
21 5376
22 2304
23 180
24 3360
25 13440
26 11520
27 1024
28 220
29 5280
30 29568
31 42240
32 11264
33 264
34 7920
35 59136
36 126720
37 67584
38 4096
39 312
40 11440
41 109824
42 329472
43 292864
44 53248
45 364
46 16016
47 192192

List of values

[4, 12, 24, 16, 40, 80, 60, 240, 64, 84, 560, 448, 112, 1120, 1792, 256, 144, 2016, 5376, 2304, 180, 3360, 13440, 11520, 1024, 220, 5280, 29568, 42240, 11264, 264, 7920, 59136, 126720, 67584, 4096, 312, 11440, 109824, 329472, 292864, 53248, 364, 16016, 192192]