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.

A271925 Numerator of (Product_{j=0..n-1} (((2*j+1)*(3*j+4))/((j+1)*(6*j+1))) - 1).

Table of values

n a(n)
1 3
2 5
3 87
4 156
5 913
6 1693
7 69769
8 658529
9 5002953
10 173619
11 1616141
12 3107877
13 239756907
14 3244922897
15 3402714857
16 6606018008
17 51386679347
18 5504537914811
19 622652618545649
20 10572475711004
21 10931562934889
22 235301799307039
23 4608689892802861
24 9034390134407023
25 488936376609325
26 959905250448181

List of values

[3, 5, 87, 156, 913, 1693, 69769, 658529, 5002953, 173619, 1616141, 3107877, 239756907, 3244922897, 3402714857, 6606018008, 51386679347, 5504537914811, 622652618545649, 10572475711004, 10931562934889, 235301799307039, 4608689892802861, 9034390134407023, 488936376609325, 959905250448181]