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.

A132883 Triangle read by rows: T(n,k) is the number of paths in the first quadrant from (0,0) to (n,0), consisting of steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0), having k U steps (0 <= k <= floor(n/2)).

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 3
5 3
6 5
7 9
8 2
9 8
10 22
11 10
12 13
13 51
14 40
15 5
16 21
17 111
18 130
19 35
20 34
21 233
22 380
23 175
24 14
25 55
26 474
27 1022
28 700
29 126
30 89
31 942
32 2590
33 2450
34 756
35 42
36 144
37 1836
38 6260
39 7770
40 3570
41 462
42 233
43 3522
44 14570
45 22890
46 14490
47 3234
48 132
49 377
50 6666
51 32870
52 63600
53 52668

List of values

[1, 1, 2, 1, 3, 3, 5, 9, 2, 8, 22, 10, 13, 51, 40, 5, 21, 111, 130, 35, 34, 233, 380, 175, 14, 55, 474, 1022, 700, 126, 89, 942, 2590, 2450, 756, 42, 144, 1836, 6260, 7770, 3570, 462, 233, 3522, 14570, 22890, 14490, 3234, 132, 377, 6666, 32870, 63600, 52668]