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A303987 as a triangular array

1
14
13636
1144900400
14008100196004900
19004410031360039690063504
11764176400282240099225007683984853776
131365715361764000013340250027662342414428814411778624
151841587600853776001200622500519437318470701190562650190400165636900

A303987 as a square array

111111111
436144400900176431365184
369008100441001764005715361587600
4001960031360028224001764000085377600
490039690099225001334025001200622500
6350476839842766234245194373184
8537761442881447070119056
117786242650190400
165636900
111111111
436144400900176431365184
369008100441001764005715361587600
4001960031360028224001764000085377600
490039690099225001334025001200622500
6350476839842766234245194373184
8537761442881447070119056
117786242650190400
165636900