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.

A120589 Self-convolution of A120588, such that a(n) = 3*A120588(n) for n >= 2.

Table of values

n a(n)
0 1
1 2
2 3
3 6
4 15
5 42
6 126
7 396
8 1287
9 4290
10 14586
11 50388
12 176358
13 624036
14 2228700
15 8023320
16 29084535
17 106073010
18 388934370
19 1432916100
20 5301789570
21 19692361260
22 73398801060
23 274447690920
24 1029178840950
25 3869712441972
26 14585839204356

List of values

[1, 2, 3, 6, 15, 42, 126, 396, 1287, 4290, 14586, 50388, 176358, 624036, 2228700, 8023320, 29084535, 106073010, 388934370, 1432916100, 5301789570, 19692361260, 73398801060, 274447690920, 1029178840950, 3869712441972, 14585839204356]