A207843 - OEIS

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A207843 as a simple table

n	a(n)
1	26
2	676
3	1044
4	7140
5	38208
6	181896
7	1006572
8	5427216
9	27640140
10	148310668
11	788944896
12	4112349344
13	21907830412
14	115744406080
15	608431534788
16	3233027543492
17	17038265421312
18	89883033240864
19	476754748569660

[26,676,1044,7140,38208,181896,1006572,5427216, 27640140,148310668,788944896,4112349344, 21907830412,115744406080,608431534788, 3233027543492,17038265421312,89883033240864, 476754748569660]