A147704 - cp's OEIS frontend

A147704 Diagonal sums of Riordan array ((1-2x)/(1 - 3x + x^2),x(1-x)/(1 - 3x + x^2)).

n	a(n)
0	1
1	1
2	3
3	8
4	23
5	66
6	190
7	547
8	1575
9	4535
10	13058
11	37599
12	108262
13	311728
14	897585
15	2584493
16	7441751
17	21427668
18	61698511
19	177653782
20	511533678
21	1472902523
22	4241053787
23	12211627683
24	35161980526
25	101244887791
26	291523035690
27	839407126544
28	2416976491841
29	6959406439833

[1, 1, 3, 8, 23, 66, 190, 547, 1575, 4535, 13058, 37599, 108262, 311728, 897585, 2584493, 7441751, 21427668, 61698511, 177653782, 511533678, 1472902523, 4241053787, 12211627683, 35161980526, 101244887791, 291523035690, 839407126544, 2416976491841, 6959406439833]

cp's OEIS Frontend

A147704 Diagonal sums of Riordan array ((1-2x)/(1 - 3x + x^2),x(1-x)/(1 - 3x + x^2)).

Table of values

List of values