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.

A343846 a(n) = binomial(2*n, n)*2^n*|Euler(n, 1/2) - Euler(n, 0)|.

Table of values

n a(n)
0 0
1 2
2 6
3 40
4 350
5 4032
6 56364
7 933504
8 17824950
9 385848320
10 9334057876
11 249576198144
12 7308698191340
13 232643283353600
14 7997684730384600
15 295306112919306240
16 11655857682806336550
17 489743069731226910720
18 21824608434847162167300
19 1028154317960939805081600

List of values

[0, 2, 6, 40, 350, 4032, 56364, 933504, 17824950, 385848320, 9334057876, 249576198144, 7308698191340, 232643283353600, 7997684730384600, 295306112919306240, 11655857682806336550, 489743069731226910720, 21824608434847162167300, 1028154317960939805081600]