A061526 - OEIS

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A061526 as a simple table

n	a(n)
1	1
2	24
3	255168
4	15038733958272
5	12123953291699459229254400
6	317158792989363996690190881249911852582400
7	550923875790150163780873329493220621458883503713639780465715200

[1,24,255168,15038733958272, 12123953291699459229254400, 317158792989363996690190881249911852582400, 55092387579015016378087332949322062145888350371363\ 9780465715200]