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A268833 as a triangular array

0
01
012
0121
01232
012323
0121212
01232321
012123432
0121234323
01232343234
012323432143
0121212323232
01212321232323
012323432341212

A268833 as a square array

000000000000000
11111111111111
2222222222222
133131133113
22222222222
3133333133
224444224
13333313
2222222
331333
44224
3331
222
31
2
000000000000000
11111111111111
2222222222222
133131133113
22222222222
3133333133
224444224
13333313
2222222
331333
44224
3331
222
31
2