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.

A118780 Semiprime(n)*semiprime(n+3) - semiprime(n+1)*semiprime(n+2), where semiprime(n) is the n-th semiprime.

Table of values

n a(n)
1 -14
2 -6
3 -5
4 0
5 -7
6 -87
7 -4
8 76
9 -8
10 -212
11 64
12 -4
13 128
14 68
15 -265
16 31
17 -12
18 -177
19 104
20 109
21 -28
22 103
23 -101
24 -40
25 -24
26 -348
27 -176
28 253
29 81
30 -285
31 -97
32 928
33 364
34 -841
35 -257
36 -361
37 -127
38 -3
39 -125
40 603
41 359
42 -675
43 367
44 -8
45 -860
46 139
47 -3
48 995
49 280
50 -1276
51 -167
52 629
53 145
54 443
55 -365
56 -579
57 171
58 -569

List of values

[-14, -6, -5, 0, -7, -87, -4, 76, -8, -212, 64, -4, 128, 68, -265, 31, -12, -177, 104, 109, -28, 103, -101, -40, -24, -348, -176, 253, 81, -285, -97, 928, 364, -841, -257, -361, -127, -3, -125, 603, 359, -675, 367, -8, -860, 139, -3, 995, 280, -1276, -167, 629, 145, 443, -365, -579, 171, -569]