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A245105 as a simple table

na(n)
01
15
2115
323075
445885991
5868409174855
6151498753814478835
7240133851527473763171555
83438118287689020571362466454991
9443637201221274201739533177428155842575
10515467077892246286863741619710574352065592734875

[1,5,115,23075,45885991,868409174855,
 151498753814478835,240133851527473763171555,
 3438118287689020571362466454991,
 443637201221274201739533177428155842575,
 515467077892246286863741619710574352065592734875]