A267666 - OEIS

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A267666 as a simple table

n	a(n)
1	15
2	450
3	13500
4	188301
5	2369260
6	25652956
7	264709135
8	2629810220
9	25695609592
10	248940754959
11	2403684195338
12	23214264266490
13	224513724291545
14	2177014307614418
15	21166636724769010
16	206403484324982865

[15,450,13500,188301,2369260,25652956,264709135, 2629810220,25695609592,248940754959,2403684195338, 23214264266490,224513724291545,2177014307614418, 21166636724769010,206403484324982865]