A042840 - OEIS

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A042840 as a simple table

n	a(n)
0	30
1	31
2	185
3	956
4	2097
5	7247
6	9344
7	16591
8	25935
9	250006
10	275941
11	525947
12	801888
13	2931611
14	6665110
15	36257161
16	187950915
17	224208076
18	13640435475
19	13864643551
20	82963653230
21	428682909701
22	940329472632

[30,31,185,956,2097,7247,9344,16591,25935,250006, 275941,525947,801888,2931611,6665110,36257161, 187950915,224208076,13640435475,13864643551, 82963653230,428682909701,940329472632]