A269030 - OEIS

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A269030 as a simple table

n	a(n)
1	12
2	48
3	348
4	2136
5	12228
6	67104
7	357756
8	1867560
9	9593844
10	48665904
11	244357740
12	1216672824
13	6015296484
14	29561944128
15	144531868764
16	703461546312
17	3410368965588
18	16475694411600
19	79347347565132
20	381071870841432

[12,48,348,2136,12228,67104,357756,1867560, 9593844,48665904,244357740,1216672824,6015296484, 29561944128,144531868764,703461546312, 3410368965588,16475694411600,79347347565132, 381071870841432]