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A088990 as a triangular array

1
01
011
0181
0151511
0131011943101
011865217902179018651
0111196357975975656357975111961
0167183560342135471987354719875603421671831

A088990 as a square array

100000000
11111111
185131018651119667183
1511194217903579755603421
13102179097565635471987
1186535797535471987
1111965603421
167183
1
100000000
11111111
185131018651119667183
1511194217903579755603421
13102179097565635471987
1186535797535471987
1111965603421
167183
1