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A236893 as a triangular array

81
245245
781975781
2605412941292605
89011900522393190058901
31253916171343611343619161731253
1116854647378247531107653824753464737111685
40694924428975371569916805791680575371569

A236893 as a square array

812457812605890131253111685406949
245975412919005916174647372442897
7814129223931343618247535371569
26051900513436111076539168057
8901916178247539168057
312534647375371569
111685
812457812605890131253111685406949
245975412919005916174647372442897
7814129223931343618247535371569
26051900513436111076539168057
8901916178247539168057
312534647375371569
111685