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.

A221173 a(0)=-3, a(1)=4; thereafter a(n) = 2*a(n-1) + a(n-2).

Table of values

n a(n)
0 -3
1 4
2 5
3 14
4 33
5 80
6 193
7 466
8 1125
9 2716
10 6557
11 15830
12 38217
13 92264
14 222745
15 537754
16 1298253
17 3134260
18 7566773
19 18267806
20 44102385
21 106472576
22 257047537
23 620567650
24 1498182837
25 3616933324
26 8732049485
27 21081032294
28 50894114073
29 122869260440
30 296632634953

List of values

[-3, 4, 5, 14, 33, 80, 193, 466, 1125, 2716, 6557, 15830, 38217, 92264, 222745, 537754, 1298253, 3134260, 7566773, 18267806, 44102385, 106472576, 257047537, 620567650, 1498182837, 3616933324, 8732049485, 21081032294, 50894114073, 122869260440, 296632634953]

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

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