A012870 - OEIS

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A012870 as a simple table

n	a(n)
0	2
1	124
2	292
3	65528
4	22998766228
5	26598037736
6	176612002738088
7	14801902575616661729776
8	32359766312586630724
9	169555914608329772744042648
10	26741840557472966493223060731901928

[2,124,292,65528,22998766228,26598037736, 176612002738088,14801902575616661729776, 32359766312586630724,169555914608329772744042648, 26741840557472966493223060731901928]