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A208906 as a triangular array

1
21
322
4382
542084
654020244
76704084248
871127022484648
981681125042242886416
109240168100850496028816016
111033024018481008264096088016032

A208906 as a square array

1234567891011
12345678910
28204070112168240330
28204070112168240
4248422450410081848
424842245041008
8642889602640
864288960
16160880
16160
32
1234567891011
12345678910
28204070112168240330
28204070112168240
4248422450410081848
424842245041008
8642889602640
864288960
16160880
16160
32