A376112 - cp's OEIS frontend

A376112 a(0) = 1; a(n) = (1/2) * Sum_{k=1..n} (3^k-1) * a(k-1) * a(n-k).

n	a(n)
0	1
1	1
2	5
3	74
4	3119
5	384099
6	140605620
7	153966205482
8	505318125737963
9	4973847408741044519
10	146857822147450491641165
11	13007931631590001724722114996
12	3456493610037973055076316970551876
13	2755388815749774181719259556096183210356
14	6589473777446361501832833785593366614276353520

[1, 1, 5, 74, 3119, 384099, 140605620, 153966205482, 505318125737963, 4973847408741044519, 146857822147450491641165, 13007931631590001724722114996, 3456493610037973055076316970551876, 2755388815749774181719259556096183210356, 6589473777446361501832833785593366614276353520]

cp's OEIS Frontend

A376112 a(0) = 1; a(n) = (1/2) * Sum_{k=1..n} (3^k-1) * a(k-1) * a(n-k).

Table of values

List of values