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A168258 as a triangular array

1
11
221
2221
33321
333321
4444321
44444321
555554321
5555554321
66666654321
666666654321

A168258 as a square array

112233445566
12233445566
1233445566
123445566
12345566
1234566
123456
12345
1234
123
12
1
112233445566
12233445566
1233445566
123445566
12345566
1234566
123456
12345
1234
123
12
1