A080263 - OEIS

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A080263 as a simple table

n	a(n)
0	2
1	50
2	906
3	247986
4	4072138
5	1059204274
6	272900475786
7	17953590946285746
8	287705670922216138
9	73724537815637830834
10	18880972926031430339466
11	1237678872789190922262530226
12	316876593058175709191975346890

[2,50,906,247986,4072138,1059204274,272900475786, 17953590946285746,287705670922216138, 73724537815637830834,18880972926031430339466, 1237678872789190922262530226, 316876593058175709191975346890]