login

A240682 as a simple table

na(n)
51
615
7210
83220
955755
101092105
1124048255
12590412240
1316027796070
14477411574640
1515495339234375
16544652100894720
1720619226977792170
18836670560604157440
1936232055577668433690
201668081561600000000000
2181363801140161673297535
224191692026268767965880320

[1,15,210,3220,55755,1092105,24048255,590412240,
 16027796070,477411574640,15495339234375,
 544652100894720,20619226977792170,
 836670560604157440,36232055577668433690,
 1668081561600000000000,81363801140161673297535,
 4191692026268767965880320]