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.

A156173 A q-factorial type triangle sequence: t(n,m)=Product[Sum[(m + 1)^i, {i, 0, k - 1}], {k, 1, n}].

Table of values

n a(n)
1 1
2 3
3 4
4 21
5 52
6 105
7 315
8 2080
9 8925
10 29016
11 9765
12 251680
13 3043425
14 22661496
15 121226245
16 615195
17 91611520
18 4154275125
19 88515803376
20 1131162092095
21 10017774259200
22 78129765
23 100131391360
24 22686496457625
25 1728802155736656

List of values

[1, 3, 4, 21, 52, 105, 315, 2080, 8925, 29016, 9765, 251680, 3043425, 22661496, 121226245, 615195, 91611520, 4154275125, 88515803376, 1131162092095, 10017774259200, 78129765, 100131391360, 22686496457625, 1728802155736656]