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.

A140709 Triangle read by rows: T(n,k) is the number of deco polyominoes of height n in which the maximal number of initial consecutive columns ending at the same level is k (1 <= k <= n).

Table of values

n a(n)
1 1
2 1
3 1
4 3
5 2
6 1
7 15
8 5
9 3
10 1
11 87
12 20
13 8
14 4
15 1
16 567
17 107
18 28
19 12
20 5
21 1
22 4167
23 674
24 135
25 40
26 17
27 6
28 1
29 34407
30 4841
31 809
32 175
33 57
34 23
35 7
36 1
37 316647
38 39248
39 5650
40 984
41 232
42 80
43 30
44 8
45 1
46 3219687
47 355895
48 44898
49 6634
50 1216
51 312
52 110
53 38
54 9
55 1
56 35878887
57 3575582
58 400793
59 51532
60 7850
61 1528
62 422
63 148
64 47
65 10
66 1

List of values

[1, 1, 1, 3, 2, 1, 15, 5, 3, 1, 87, 20, 8, 4, 1, 567, 107, 28, 12, 5, 1, 4167, 674, 135, 40, 17, 6, 1, 34407, 4841, 809, 175, 57, 23, 7, 1, 316647, 39248, 5650, 984, 232, 80, 30, 8, 1, 3219687, 355895, 44898, 6634, 1216, 312, 110, 38, 9, 1, 35878887, 3575582, 400793, 51532, 7850, 1528, 422, 148, 47, 10, 1]