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.

A346667 a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(7*k,k) / (6*k + 1).

Table of values

n a(n)
0 1
1 0
2 6
3 51
4 578
5 7011
6 89931
7 1198798
8 16445122
9 230643888
10 3292247673
11 47672499727
12 698569117499
13 10339672571689
14 154357100458366
15 2321475460350492
16 35140713973159266
17 534971413383669580
18 8185501429052369700
19 125811555778930237392
20 1941590759206061655069

List of values

[1, 0, 6, 51, 578, 7011, 89931, 1198798, 16445122, 230643888, 3292247673, 47672499727, 698569117499, 10339672571689, 154357100458366, 2321475460350492, 35140713973159266, 534971413383669580, 8185501429052369700, 125811555778930237392, 1941590759206061655069]