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A055905 as a triangular array

1
-11
2-31
-59-51
12-2519-71
-1748-5532-91
-626060-9648-111
677-12296397-14967-131
-28406435-55652275-165-21589-151
-1451-618918556-159745778-523-295114-171

A055905 as a square array

1-12-512-17-62677-2840-1451
1-39-254860-12296435-6189
1-519-5560639-556518556
1-732-9672275-15974
1-948-149-1655778
1-1167-215-523
1-1389-295
1-15114
1-17
1
1-12-512-17-62677-2840-1451
1-39-254860-12296435-6189
1-519-5560639-556518556
1-732-9672275-15974
1-948-149-1655778
1-1167-215-523
1-1389-295
1-15114
1-17
1