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.

A052951 Expansion of (1 + x - 2*x^2)/(1 - 2*x)^2.

Table of values

n a(n)
0 1
1 5
2 14
3 36
4 88
5 208
6 480
7 1088
8 2432
9 5376
10 11776
11 25600
12 55296
13 118784
14 253952
15 540672
16 1146880
17 2424832
18 5111808
19 10747904
20 22544384
21 47185920
22 98566144
23 205520896
24 427819008
25 889192448
26 1845493760
27 3825205248
28 7918845952

List of values

[1, 5, 14, 36, 88, 208, 480, 1088, 2432, 5376, 11776, 25600, 55296, 118784, 253952, 540672, 1146880, 2424832, 5111808, 10747904, 22544384, 47185920, 98566144, 205520896, 427819008, 889192448, 1845493760, 3825205248, 7918845952]