A129379 - cp's OEIS frontend

A129379 a(n) = sum of sums of all sets of three distinct preceding terms otherwise a(n) = n for n <= 3.

n	a(n)
1	1
2	2
3	3
4	6
5	36
6	288
7	3360
8	55440
9	1241856
10	36427776
11	1358235648
12	62818398720
13	3531789972480
14	237336286150656
15	18792718657929216
16	1732062236305809408
17	183865068161693614080
18	22273939685873740677120

[1, 2, 3, 6, 36, 288, 3360, 55440, 1241856, 36427776, 1358235648, 62818398720, 3531789972480, 237336286150656, 18792718657929216, 1732062236305809408, 183865068161693614080, 22273939685873740677120]

cp's OEIS Frontend

A129379 a(n) = sum of sums of all sets of three distinct preceding terms otherwise a(n) = n for n <= 3.

Table of values

List of values