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A308440 as a triangular array

1
51
37151
365223301
45013675745501
6660568071184501865751
114987714115154791016475039201051
226875653251266313260030224450118165073221401
503589781825175275393017185799480508103711436590125581801

A308440 as a square array

1537365450166605114987722687565503589781
115223367568071141151532512663825175275
1307451845047910113260030393017185
150186564750224450179948050
17539201816508103711
11057322436590
114012558
1180
1
1537365450166605114987722687565503589781
115223367568071141151532512663825175275
1307451845047910113260030393017185
150186564750224450179948050
17539201816508103711
11057322436590
114012558
1180
1