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.

A333071 Total area under all lattice paths from (0,0) to (n,0) that do not go below the x-axis, and at (x,y) only allow steps (1,v) with v in {-1,0,1,...,y+1}.

Table of values

n a(n)
0 0
1 0
2 1
3 4
4 16
5 63
6 239
7 895
8 3343
9 12503
10 46905
11 176620
12 667664
13 2533699
14 9650737
15 36887383
16 141448958
17 544022417
18 2098082719
19 8111788699
20 31434420426
21 122068414186
22 474932563378
23 1851059631879
24 7226108097869
25 28250493771358
26 110594307388370
27 433488248791630

List of values

[0, 0, 1, 4, 16, 63, 239, 895, 3343, 12503, 46905, 176620, 667664, 2533699, 9650737, 36887383, 141448958, 544022417, 2098082719, 8111788699, 31434420426, 122068414186, 474932563378, 1851059631879, 7226108097869, 28250493771358, 110594307388370, 433488248791630]