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.

A238112 Expansion of g.f.: (1-5*x+2*x^2+(2*x-1)*sqrt(x^2-6*x+1))/(4*x).

Table of values

n a(n)
0 0
1 0
2 1
3 5
4 23
5 107
6 509
7 2473
8 12235
9 61463
10 312761
11 1609005
12 8355423
13 43741635
14 230614773
15 1223414481
16 6525975315
17 34981856303
18 188341400945
19 1018043304661
20 5522585343271
21 30056208280091
22 164066282507501
23 898029800045945
24 4927810473507803
25 27103503645610567
26 149393131346947369
27 825093297608481533

List of values

[0, 0, 1, 5, 23, 107, 509, 2473, 12235, 61463, 312761, 1609005, 8355423, 43741635, 230614773, 1223414481, 6525975315, 34981856303, 188341400945, 1018043304661, 5522585343271, 30056208280091, 164066282507501, 898029800045945, 4927810473507803, 27103503645610567, 149393131346947369, 825093297608481533]

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

Content is available under The OEIS End-User License Agreement.