A279976 - OEIS

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A279976 as a simple table

n	a(n)
1	15
2	277
3	8068
4	226771
5	5870751
6	144819856
7	3444870482
8	79672440007
9	1801951754910
10	40020022178950
11	875485447655303
12	18909516686710743
13	403990472666974061
14	8549840572786983933
15	179455644823143101693

[15,277,8068,226771,5870751,144819856,3444870482, 79672440007,1801951754910,40020022178950, 875485447655303,18909516686710743, 403990472666974061,8549840572786983933, 179455644823143101693]