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A121662 as a triangular array

1
42
1593
6440164
32520585255
19561236516156366
13699865936191099259497
109600692802896088002080400648
98640962352926064979209187293609585819
98641006235300260650079210018730036100586082010010

A121662 as a square array

1415643251956136991096009864099864100
294020512368659692806235296235300
316855163619289602606492606500
4251561099880079209792100
536259208018729187300
649400360936100
7645855860
881820
9100
10
1415643251956136991096009864099864100
294020512368659692806235296235300
316855163619289602606492606500
4251561099880079209792100
536259208018729187300
649400360936100
7645855860
881820
9100
10