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.

A387185 a(n) = n*2^(n-1) + binomial(n,2)*2^(n-2) + binomial(n,3)*2^(n-3).

Table of values

n a(n)
0 0
1 1
2 5
3 19
4 64
5 200
6 592
7 1680
8 4608
9 12288
10 32000
11 81664
12 204800
13 505856
14 1232896
15 2969600
16 7077888
17 16711680
18 39124992
19 90898432
20 209715200
21 480772096
22 1095761920
23 2484076544
24 5603590144
25 12582912000
26 28135391232
27 62662901760
28 139049566208
29 307492814848
30 677799526400

List of values

[0, 1, 5, 19, 64, 200, 592, 1680, 4608, 12288, 32000, 81664, 204800, 505856, 1232896, 2969600, 7077888, 16711680, 39124992, 90898432, 209715200, 480772096, 1095761920, 2484076544, 5603590144, 12582912000, 28135391232, 62662901760, 139049566208, 307492814848, 677799526400]