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A286718 as a triangular array

1
11
451
2839121
280418159221
364057142485445351
58240950644547496051005511
11065601864456959070227969287001974701
2434432042124592229639965974388859369721283514921
608608000107745912061622449217232369627458613266256915997858141171
1704102400030777463360183317448965441287980941164860102010545714195332277090901451

A286718 as a square array

1142828036405824011065602434432060860800017041024000
1539418571495064186445642124592107745912030777463360
1121592485454749590702296399661622449218331744896
122445960522796959743881723236965441287980
13510052870085936927458613941164860
1511974721282662569102010545
17035141599787141953
1925814322770
11179090
1145
1
1142828036405824011065602434432060860800017041024000
1539418571495064186445642124592107745912030777463360
1121592485454749590702296399661622449218331744896
122445960522796959743881723236965441287980
13510052870085936927458613941164860
1511974721282662569102010545
17035141599787141953
1925814322770
11179090
1145
1