A017311 - OEIS

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A017311 as a simple table

n	a(n)
0	2187
1	62748517
2	3404825447
3	42618442977
4	271818611107
5	1174711139837
6	3938980639167
7	11047398519097
8	27136050989627
9	60170087060757
10	122987386542487
11	235260548044817
12	425927596977747
13	736141813551277

[2187,62748517,3404825447,42618442977, 271818611107,1174711139837,3938980639167, 11047398519097,27136050989627,60170087060757, 122987386542487,235260548044817,425927596977747, 736141813551277]