A041330 - OEIS

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A041330 as a simple table

n	a(n)
0	13
1	27
2	40
3	67
4	107
5	388
6	2047
7	26999
8	137042
9	438125
10	575167
11	1013292
12	1588459
13	4190210
14	110533919
15	225258048
16	335791967
17	561050015
18	896841982
19	3251575961
20	17154721787
21	226262959192
22	1148469517747

[13,27,40,67,107,388,2047,26999,137042,438125, 575167,1013292,1588459,4190210,110533919, 225258048,335791967,561050015,896841982, 3251575961,17154721787,226262959192,1148469517747]