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A303800 as a triangular array

1
22
444
812128
1624172416
326430306432
6418470907018464
128432121231231121432128
25610882216315626312211088256
512294442115861406140615864212944512
10247360800

A303800 as a square array

12481632641282565121024
24122464184432108829447360
412173070121221421800
82430902316311586
1664702315621406
321841216311406
644322211586
1281088421
2562944
512
12481632641282565121024
24122464184432108829447360
412173070121221421800
82430902316311586
1664702315621406
321841216311406
644322211586
1281088421
2562944
512