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.

A335442 List enumerated in lexicographic order of (n, s, k), where for each n >= 1, for each s a subset of 1..n with n-1 elements, and for each k in 0..n-1, we give the value of (Sum_{t subset of s, Card(t)=k} Product_{x in t} x).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 1
7 3
8 2
9 1
10 4
11 3
12 1
13 5
14 6
15 1
16 6
17 11
18 6
19 1
20 7
21 14
22 8
23 1
24 8
25 19
26 12
27 1
28 9
29 26
30 24
31 1
32 10
33 35
34 50
35 24
36 1
37 11
38 41
39 61
40 30
41 1
42 12
43 49
44 78
45 40
46 1
47 13
48 59
49 107
50 60
51 1
52 14
53 71
54 154
55 120
56 1
57 15
58 85
59 225
60 274
61 120
62 1
63 16
64 95
65 260
66 324
67 144
68 1
69 17
70 107
71 307
72 396
73 180
74 1
75 18
76 121
77 372
78 508
79 240
80 1
81 19
82 137
83 461
84 702
85 360
86 1
87 20
88 155
89 580
90 1044
91 720

List of values

[1, 1, 1, 1, 2, 1, 3, 2, 1, 4, 3, 1, 5, 6, 1, 6, 11, 6, 1, 7, 14, 8, 1, 8, 19, 12, 1, 9, 26, 24, 1, 10, 35, 50, 24, 1, 11, 41, 61, 30, 1, 12, 49, 78, 40, 1, 13, 59, 107, 60, 1, 14, 71, 154, 120, 1, 15, 85, 225, 274, 120, 1, 16, 95, 260, 324, 144, 1, 17, 107, 307, 396, 180, 1, 18, 121, 372, 508, 240, 1, 19, 137, 461, 702, 360, 1, 20, 155, 580, 1044, 720]