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.

A121079 a(n) = Sum_{i=0..n} C(n,i)^2*i!*4^i + 2^n*n!.

Table of values

n a(n)
0 2
1 7
2 57
3 757
4 13889
5 322021
6 8962225
7 289928549
8 10666353409
9 439225736005
10 19999574572721
11 997265831223685
12 54028099173536449
13 3159178743189436709
14 198259676112757095985
15 13289233274778582230821
16 947420482287986880154625
17 71574264415491967142194309

List of values

[2, 7, 57, 757, 13889, 322021, 8962225, 289928549, 10666353409, 439225736005, 19999574572721, 997265831223685, 54028099173536449, 3159178743189436709, 198259676112757095985, 13289233274778582230821, 947420482287986880154625, 71574264415491967142194309]