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.

A350090 a(n) is the number of indices i in the range 0 <= i <= n-1 such that A003215(n) - A003215(i) is an oblong number (A002378), where A003215 are the hex numbers.

Table of values

n a(n)
0 0
1 1
2 1
3 1
4 1
5 3
6 1
7 2
8 3
9 1
10 1
11 1
12 3
13 1
14 1
15 3
16 3
17 1
18 3
19 3
20 3
21 3
22 5
23 1
24 1
25 1
26 5
27 1
28 1
29 3
30 1
31 3
32 1
33 7
34 1
35 3
36 3
37 1
38 1
39 3
40 7
41 1
42 1
43 3
44 3
45 1
46 3
47 3
48 1
49 1
50 3
51 3
52 1
53 3
54 7
55 1
56 3
57 7
58 1
59 7
60 3
61 3
62 1
63 1
64 3
65 3
66 1
67 1
68 3
69 3
70 7
71 5
72 3
73 3
74 1
75 5
76 3
77 3
78 7
79 3
80 1
81 1
82 3
83 3
84 3
85 7
86 1
87 3
88 1
89 3
90 1

List of values

[0, 1, 1, 1, 1, 3, 1, 2, 3, 1, 1, 1, 3, 1, 1, 3, 3, 1, 3, 3, 3, 3, 5, 1, 1, 1, 5, 1, 1, 3, 1, 3, 1, 7, 1, 3, 3, 1, 1, 3, 7, 1, 1, 3, 3, 1, 3, 3, 1, 1, 3, 3, 1, 3, 7, 1, 3, 7, 1, 7, 3, 3, 1, 1, 3, 3, 1, 1, 3, 3, 7, 5, 3, 3, 1, 5, 3, 3, 7, 3, 1, 1, 3, 3, 3, 7, 1, 3, 1, 3, 1]