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A181206 as a triangular array

1
22
393
532325
81212291218
134501845184545013
211681143203200014320168121
346272112485535229535229112485627234
552340988016390491691911442090491698801632340955
8987362

A181206 as a square array

123581321345589
2932121450168162722340987362
332229184514320112485880163
51211845320005352299049169
84501432053522919114420
1316811124859049169
216272880163
3423409
55
123581321345589
2932121450168162722340987362
332229184514320112485880163
51211845320005352299049169
84501432053522919114420
1316811124859049169
216272880163
3423409
55