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A086271 as a triangular array

1
13
146
15910
16121615
1715222521
181828353628
19213445514936
11024405566706445
1112746658191928155
1123052759611212011710066
11333588511113314815314512178

A086271 as a square array

111111111111
345678910111213
691215182124273033
101622283440465258
1525354555657585
213651668196111
28497091112133
366492120148
4581117153
55100145
66121
78
111111111111
345678910111213
691215182124273033
101622283440465258
1525354555657585
213651668196111
28497091112133
366492120148
4581117153
55100145
66121
78