A237334 - OEIS

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A237334 as a simple table

n	a(n)
1	1980
2	41220
3	821234
4	17627820
5	380945760
6	8406402902
7	187274820848
8	4212082221444
9	95349805566302
10	2169810608997912
11	49567582138584820
12	1135678343874996398
13	26077450896771261320
14	599775893998365758200

[1980,41220,821234,17627820,380945760,8406402902, 187274820848,4212082221444,95349805566302, 2169810608997912,49567582138584820, 1135678343874996398,26077450896771261320, 599775893998365758200]