A179512 - OEIS

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A179512 as a simple table

n	a(n)
1	12
2	13
3	15
4	17
5	25
6	47
7	117
8	409
9	1985
10	13269
11	116555
12	1301043
13	17911307
14	296651169
15	5792367991
16	131137897895
17	3395020992813
18	99343099511585

[12,13,15,17,25,47,117,409,1985,13269,116555, 1301043,17911307,296651169,5792367991, 131137897895,3395020992813,99343099511585]