A012526 - OEIS

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A012526 as a simple table

n	a(n)
0	2
1	232
2	443552
3	4070626432
4	114229813187072
5	7662813919487567872
6	1050565400687692105490432
7	264025846282089475815489175552

[2,232,443552,4070626432,114229813187072, 7662813919487567872,1050565400687692105490432, 264025846282089475815489175552]