A079330 - OEIS

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A079330 as a simple table

n	a(n)
1	1
2	2
3	13
4	146
5	781
6	16328
7	6316012
8	38759594
9	9655714457
10	50134571594
11	25626917879
12	638499558282328
13	125381104727404588
14	435948294065152496
15	146414084312394268792
16	1076603090723736731974978

[1,2,13,146,781,16328,6316012,38759594,9655714457, 50134571594,25626917879,638499558282328, 125381104727404588,435948294065152496, 146414084312394268792,1076603090723736731974978]