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.

A248048 Numerator of u(n) where u(n) = (u(n-1) + u(n-2)) * (u(n-2) + u(n-3)) / u(n-4) with u(0) = -1, u(1) = u(2) = u(3) = 1.

Table of values

n a(n)
0 -1
1 1
2 1
3 1
4 -4
5 -6
6 30
7 -240
8 1260
9 35700
10 1256640
11 -199020360
12 -202839655480
13 1124753048683264
14 -181696576073176468304
15 1026657060420588391021488976
16 919637161132261232937508950440493056
17 839430326120023909391651548323223480699275649536

List of values

[-1, 1, 1, 1, -4, -6, 30, -240, 1260, 35700, 1256640, -199020360, -202839655480, 1124753048683264, -181696576073176468304, 1026657060420588391021488976, 919637161132261232937508950440493056, 839430326120023909391651548323223480699275649536]

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

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