A251517 - OEIS

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A251517 as a simple table

n	a(n)
1	246
2	3798
3	58618
4	904734
5	13963994
6	215525422
7	3326498602
8	51342402526
9	792437518266
10	12230772022158
11	188774232427978
12	2913610912231614
13	44969742102454874
14	694079534186116462
15	10712678731366753642

[246,3798,58618,904734,13963994,215525422, 3326498602,51342402526,792437518266, 12230772022158,188774232427978,2913610912231614, 44969742102454874,694079534186116462, 10712678731366753642]