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.

A322249 a(n) = A322248(n)^2, the square of the central coefficient in (1 + 5*x + 16*x^2)^n.

Table of values

n a(n)
0 1
1 25
2 3249
3 366025
4 48455521
5 6646325625
6 947789867025
7 138422872355625
8 20598606105401025
9 3109408600719825625
10 474780862425986767729
11 73175222677868396505225
12 11366022325041154078402081
13 1777059915791491092441607225
14 279404859303904515406536763089
15 44144451113336819125597110875625
16 7004264626817806908496520658161025
17 1115512654966236899680358546064905625

List of values

[1, 25, 3249, 366025, 48455521, 6646325625, 947789867025, 138422872355625, 20598606105401025, 3109408600719825625, 474780862425986767729, 73175222677868396505225, 11366022325041154078402081, 1777059915791491092441607225, 279404859303904515406536763089, 44144451113336819125597110875625, 7004264626817806908496520658161025, 1115512654966236899680358546064905625]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.