A173998 - cp's OEIS frontend

A173998 For n>=1, a(n) = n + 2 + Sum_{i=1..n-1} a(i)*a(n-i).

n	a(n)
1	3
2	13
3	83
4	673
5	6203
6	61613
7	642683
8	6940673
9	76930803
10	870136013
11	10002590883
12	116521027873
13	1372486213803
14	16318813519213
15	195599588228683
16	2360929398934273
17	28671940652447203
18	350089944825571213
19	4295280755452388083
20	52926654021145267873

[3, 13, 83, 673, 6203, 61613, 642683, 6940673, 76930803, 870136013, 10002590883, 116521027873, 1372486213803, 16318813519213, 195599588228683, 2360929398934273, 28671940652447203, 350089944825571213, 4295280755452388083, 52926654021145267873]

cp's OEIS Frontend

A173998 For n>=1, a(n) = n + 2 + Sum_{i=1..n-1} a(i)*a(n-i).

Table of values

List of values