A206408 - OEIS

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A206408 as a simple table

n	a(n)
1	423
2	5199
3	69585
4	953865
5	13148043
6	181467207
7	2505335985
8	34591087977
9	477605748651
10	6594418668279
11	91050821905233
12	1257162198849945
13	17357963791492635
14	239665900404460215
15	3309129149913889857

[423,5199,69585,953865,13148043,181467207, 2505335985,34591087977,477605748651,6594418668279, 91050821905233,1257162198849945,17357963791492635, 239665900404460215,3309129149913889857]