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.

A140498 a(n) = 3*a(n-1)-3*a(n-2)+3*a(n-3) with a(0)=1, a(1)=3, a(2)=7.

Table of values

n a(n)
0 1
1 3
2 7
3 15
4 33
5 75
6 171
7 387
8 873
9 1971
10 4455
11 10071
12 22761
13 51435
14 116235
15 262683
16 593649
17 1341603
18 3031911
19 6851871
20 15484689
21 34994187
22 79084107
23 178723827
24 403901721
25 912786003
26 2062824327
27 4661820135
28 10535345433
29 23809048875
30 53806570731
31 121598601867

List of values

[1, 3, 7, 15, 33, 75, 171, 387, 873, 1971, 4455, 10071, 22761, 51435, 116235, 262683, 593649, 1341603, 3031911, 6851871, 15484689, 34994187, 79084107, 178723827, 403901721, 912786003, 2062824327, 4661820135, 10535345433, 23809048875, 53806570731, 121598601867]