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.

A127216 a(n) = 2^n*tetranacci(n) or (2^n)*A001648(n).

Table of values

n a(n)
1 2
2 12
3 56
4 240
5 832
6 3264
7 12672
8 48896
9 187904
10 724992
11 2795520
12 10776576
13 41541632
14 160153600
15 617414656
16 2380201984
17 9175957504
18 35374497792
19 136373075968
20 525735034880
21 2026773676032
22 7813464064000
23 30121872326656
24 116123550875648
25 447670682386432

List of values

[2, 12, 56, 240, 832, 3264, 12672, 48896, 187904, 724992, 2795520, 10776576, 41541632, 160153600, 617414656, 2380201984, 9175957504, 35374497792, 136373075968, 525735034880, 2026773676032, 7813464064000, 30121872326656, 116123550875648, 447670682386432]