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A123971 as a triangular array

1
2-1
5-51
13-198-1
34-6542-111
89-210183-7414-1
233-654717-394115-171
610-19852622-1825725-16520-1
1597-59119134-77033885-1203224-231
4181-1734530691-3041818633-7329

A123971 as a square array

12513348923361015974181
-1-5-19-65-210-654-1985-5911-17345
18421837172622913430691
-1-11-74-394-1825-7703-30418
114115725388518633
-1-17-165-1203-7329
120224
-1-23
1
12513348923361015974181
-1-5-19-65-210-654-1985-5911-17345
18421837172622913430691
-1-11-74-394-1825-7703-30418
114115725388518633
-1-17-165-1203-7329
120224
-1-23
1