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.

A171840 Triangle read by rows, truncated columns of an array formed by taking sets of P(n) = Pascal's triangle, with the 1's column shifted up n = 1,2,3,... times. Then the n-th row of the array = lim_{k->infinity}, k=1,2,3,...; (P(n))^k, deleting the first 1.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 2
6 5
7 1
8 2
9 4
10 15
11 1
12 2
13 4
14 9
15 52
16 1
17 2
18 4
19 8
20 23
21 203
22 1
23 2
24 4
25 8
26 17
27 65
28 877
29 1
30 2
31 4
32 8
33 16
34 40
35 199
36 4140
37 1
38 2
39 4
40 8
41 16
42 33
43 104
44 654
45 21147
46 1
47 2
48 4
49 8
50 16
51 32
52 73
53 291
54 2296
55 115975
56 1
57 2
58 4
59 8
60 16
61 32
62 65
63 177
64 857
65 8569
66 678570

List of values

[1, 1, 2, 1, 2, 5, 1, 2, 4, 15, 1, 2, 4, 9, 52, 1, 2, 4, 8, 23, 203, 1, 2, 4, 8, 17, 65, 877, 1, 2, 4, 8, 16, 40, 199, 4140, 1, 2, 4, 8, 16, 33, 104, 654, 21147, 1, 2, 4, 8, 16, 32, 73, 291, 2296, 115975, 1, 2, 4, 8, 16, 32, 65, 177, 857, 8569, 678570]