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A055818 as a triangular array

1
11
121
1531
111941
123241451
14760432061
195144122692771
11913363282171033581
13837688486403541464491
1767172821281800113154319954101

A055818 as a square array

11111111111
12511234795191383767
13924601443367681728
1414431223288482128
1520692176401800
16271033541131
1735146543
1844199
1954
110
1
11111111111
12511234795191383767
13924601443367681728
1414431223288482128
1520692176401800
16271033541131
1735146543
1844199
1954
110
1