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.

A086400 (1/p)*(M(p)-1) where p runs through the odd primes and M(p) = A001006(p) is the p-th Motzkin number.

Table of values

n a(n)
1 1
2 4
3 18
4 527
5 3218
6 138634
7 957857
8 49120018
9 20473889132
10 156766505690
11 74324776203270
12 4686290685410776
13 37541445026997947
14 2445882966702428971
15 1327937505693018342712
16 743757817682170309535791
17 6166664829842021655267818
18 3568011384191503508502528953
19 250506784439047192764704514076

List of values

[1, 4, 18, 527, 3218, 138634, 957857, 49120018, 20473889132, 156766505690, 74324776203270, 4686290685410776, 37541445026997947, 2445882966702428971, 1327937505693018342712, 743757817682170309535791, 6166664829842021655267818, 3568011384191503508502528953, 250506784439047192764704514076]