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A259471 as a triangular array

1
11
131
1771
11966191
147916916471
11301681691212168161301
134337363012888450128884503736303431
19519727010241121369814334255100241121369897270109511
12615289374391575737451509220800978810812208009788108157573745150928937439126151

A259471 as a square array

1111111111
13719471303439512615
1766916168163736309727010289374391
11991691212128884502411213698575737451509
14716816128884501433425510022080097881081
1130373630241121369822080097881081
13439727010575737451509
1951289374391
12615
1
1111111111
13719471303439512615
1766916168163736309727010289374391
11991691212128884502411213698575737451509
14716816128884501433425510022080097881081
1130373630241121369822080097881081
13439727010575737451509
1951289374391
12615
1