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.

A084774 Coefficients of 1/sqrt(1-14*x+9*x^2); also, a(n) is the central coefficient of (1+7x+10x^2)^n.

Table of values

n a(n)
0 1
1 7
2 69
3 763
4 8881
5 106407
6 1298949
7 16065483
8 200630241
9 2524253767
10 31947470149
11 406281388443
12 5187375332881
13 66454791792487
14 853788052488069
15 10996378059281643
16 141934540736139201
17 1835494145265388167
18 23776671158743933509
19 308463567293772941883

List of values

[1, 7, 69, 763, 8881, 106407, 1298949, 16065483, 200630241, 2524253767, 31947470149, 406281388443, 5187375332881, 66454791792487, 853788052488069, 10996378059281643, 141934540736139201, 1835494145265388167, 23776671158743933509, 308463567293772941883]