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A176918 as a triangular array

1
-10
-100
-1100
-10000
-111000
-1000000
-11000000
-101000000
-1100100000
-10000000000
-11100-100

A176918 as a square array

1-1-1-1-1-1-1-1-1-1-1-1
00101010101
0001001001
000000000
00000100
000000-1
000000
00000
000
00
0
1-1-1-1-1-1-1-1-1-1-1-1
00101010101
0001001001
000000000
00000100
000000-1
000000
00000
000
00
0