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A203647 as a triangular array

1
12
124
1258
1251416
125154132
125155112264
1251552187365128
12515522027151094256
125155220385527953281512
125155220387638451105198421024
1251552203877

A203647 as a square array

111111111111
22222222222
4555555555
81415151515151515
1641515252525252
32122187202203203203
64365715855876877
128109427953845
256328111051
5129842
1024
111111111111
22222222222
4555555555
81415151515151515
1641515252525252
32122187202203203203
64365715855876877
128109427953845
256328111051
5129842
1024