A147748 - cp's OEIS frontend

A147748 Row sums of Riordan array ((1-3x+x^2)/(1-4x+3x^2), x(1-2x)/(1-4x+3x^2)).

n	a(n)
0	1
1	2
2	6
3	20
4	70
5	250
6	900
7	3250
8	11750
9	42500
10	153750
11	556250
12	2012500
13	7281250
14	26343750
15	95312500
16	344843750
17	1247656250
18	4514062500
19	16332031250
20	59089843750
21	213789062500
22	773496093750
23	2798535156250
24	10125195312500

[1, 2, 6, 20, 70, 250, 900, 3250, 11750, 42500, 153750, 556250, 2012500, 7281250, 26343750, 95312500, 344843750, 1247656250, 4514062500, 16332031250, 59089843750, 213789062500, 773496093750, 2798535156250, 10125195312500]

cp's OEIS Frontend

A147748 Row sums of Riordan array ((1-3x+x^2)/(1-4x+3x^2), x(1-2x)/(1-4x+3x^2)).

Table of values

List of values