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A338864 as a triangular array

1
41
12121
7296241
240840360401
288072004920960601
100807056065520193202100841
1612807459208870403628805880040321121
10886407983360126403206652800148176015019270561441

A338864 as a square array

1412722402880100801612801088640
112968407200705607459207983360
12436049206552088704012640320
140960193203628806652800
1602100588001481760
1844032150192
11127056
1144
1
1412722402880100801612801088640
112968407200705607459207983360
12436049206552088704012640320
140960193203628806652800
1602100588001481760
1844032150192
11127056
1144
1