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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.

A247502 Triangle read by rows: coefficients of polynomials related to the exponential generating function of sequences generated by Narayana polynomials evaluated at the integers; n>=1, 0<=k

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 4
6 1
7 1
8 13
9 9
10 1
11 1
12 41
13 57
14 16
15 1
16 1
17 131
18 320
19 165
20 25
21 1
22 1
23 428
24 1711
25 1420
26 380
27 36
28 1
29 1
30 1429
31 8967
32 11151
33 4620
34 756
35 49
36 1
37 1
38 4861
39 46663
40 83202
41 49665
42 12306
43 1358
44 64
45 1
46 1
47 16795
48 242634
49 602407
50 495327
51 172893
52 28476
53 2262
54 81
55 1

List of values

[1, 1, 1, 1, 4, 1, 1, 13, 9, 1, 1, 41, 57, 16, 1, 1, 131, 320, 165, 25, 1, 1, 428, 1711, 1420, 380, 36, 1, 1, 1429, 8967, 11151, 4620, 756, 49, 1, 1, 4861, 46663, 83202, 49665, 12306, 1358, 64, 1, 1, 16795, 242634, 602407, 495327, 172893, 28476, 2262, 81, 1]