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.

A248512 Sequence based on repeating in turn the subtract, add and multiply operations on the previous 2 terms, starting with 0, 1.

Table of values

n a(n)
1 0
2 1
3 1
4 2
5 2
6 0
7 2
8 0
9 -2
10 -2
11 4
12 6
13 10
14 60
15 50
16 110
17 5500
18 5390
19 10890
20 58697100
21 58686210
22 117383310
23 6888781581155100
24 6888781463771790
25 13777563044926890
26 94910620919839581404684194433100
27 94910620919839567627121149506210

List of values

[0, 1, 1, 2, 2, 0, 2, 0, -2, -2, 4, 6, 10, 60, 50, 110, 5500, 5390, 10890, 58697100, 58686210, 117383310, 6888781581155100, 6888781463771790, 13777563044926890, 94910620919839581404684194433100, 94910620919839567627121149506210]