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.

A240542 The midpoint of the (rotated) Dyck path from (0, n) to (n, 0) defined by A237593 has coordinates (a(n), a(n)). Also a(n) is the alternating sum of the n-th row of A235791.

Table of values

n a(n)
1 1
2 2
3 2
4 3
5 3
6 5
7 5
8 6
9 7
10 7
11 7
12 9
13 9
14 9
15 11
16 12
17 12
18 13
19 13
20 15
21 15
22 15
23 15
24 17
25 18
26 18
27 18
28 20
29 20
30 22
31 22
32 23
33 23
34 23
35 25
36 26
37 26
38 26
39 26
40 28
41 28
42 30
43 30
44 30
45 32
46 32
47 32
48 34
49 35
50 36
51 36
52 36
53 36
54 38
55 38
56 40
57 40
58 40
59 40
60 42
61 42
62 42
63 44
64 45
65 45
66 47
67 47
68 47
69 47
70 49
71 49
72 52
73 52

List of values

[1, 2, 2, 3, 3, 5, 5, 6, 7, 7, 7, 9, 9, 9, 11, 12, 12, 13, 13, 15, 15, 15, 15, 17, 18, 18, 18, 20, 20, 22, 22, 23, 23, 23, 25, 26, 26, 26, 26, 28, 28, 30, 30, 30, 32, 32, 32, 34, 35, 36, 36, 36, 36, 38, 38, 40, 40, 40, 40, 42, 42, 42, 44, 45, 45, 47, 47, 47, 47, 49, 49, 52, 52]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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