A082428 - cp's OEIS frontend

A082428 a(1) = 1; a(n) = 3 + n * Sum_{k=1..n-1} a(k).

n	a(n)
1	1
2	5
3	21
4	111
5	693
6	4989
7	40743
8	372507
9	3771633
10	41907033
11	507075099
12	6638074023
13	93486209157
14	1409484384213
15	22652427603423
16	386601431098419
17	6982988349215193
18	133087542655630737
19	2669144605482372003
20	56192518010155200063
21	1239045022123922161389
22	28557037652760872672013

[1, 5, 21, 111, 693, 4989, 40743, 372507, 3771633, 41907033, 507075099, 6638074023, 93486209157, 1409484384213, 22652427603423, 386601431098419, 6982988349215193, 133087542655630737, 2669144605482372003, 56192518010155200063, 1239045022123922161389, 28557037652760872672013]

cp's OEIS Frontend

A082428 a(1) = 1; a(n) = 3 + n * Sum_{k=1..n-1} a(k).

Table of values

List of values