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.

A123934 Triangle T(n,k), 1<=k<=n :forms the odd-indexed trinomial coefficients (A027907).

Table of values

n a(n)
1 1
2 2
3 2
4 3
5 7
6 3
7 4
8 16
9 16
10 4
11 5
12 30
13 51
14 30
15 5
16 6
17 50
18 126
19 126
20 50
21 6
22 7
23 77
24 266
25 393
26 266
27 77
28 7

List of values

[1, 2, 2, 3, 7, 3, 4, 16, 16, 4, 5, 30, 51, 30, 5, 6, 50, 126, 126, 50, 6, 7, 77, 266, 393, 266, 77, 7]