A202810 - OEIS

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A202810 as a simple table

n	a(n)
1	1
2	21
3	881
4	43483
5	1874539
6	60758779
7	1420586923
8	24496279000
9	324818660255
10	3450301922085
11	30392148400009
12	228299392737693
13	1495681511952100
14	8702151387743758
15	45631559860107036
16	218282278670309658

[1,21,881,43483,1874539,60758779,1420586923, 24496279000,324818660255,3450301922085, 30392148400009,228299392737693,1495681511952100, 8702151387743758,45631559860107036, 218282278670309658]