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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.

A134987 Third extended Jacobsthal recurrence: a(n)=4a(n-1)-6(n-2)+4a(n-3)-a(n-4)+2a(n-5).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 1
5 4
6 10
7 20
8 35
9 58
10 100
11 192
12 405
13 880
14 1874
15 3844
16 7631
17 14886
18 29020
19 57192
20 114249
21 230300
22 465226
23 936948
24 1877771
25 3748498
26 7470532
27 14895728
28 29749837
29 59514152
30 119166962
31 238627620
32 477606935
33 955315390
34 1909991772
35 3818208792

List of values

[0, 0, 0, 0, 1, 4, 10, 20, 35, 58, 100, 192, 405, 880, 1874, 3844, 7631, 14886, 29020, 57192, 114249, 230300, 465226, 936948, 1877771, 3748498, 7470532, 14895728, 29749837, 59514152, 119166962, 238627620, 477606935, 955315390, 1909991772, 3818208792]

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

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