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A306015 as a triangular array

0
11
121
4631
15241241
76120602051
4557203601203061
3186504025208402104271
254874032020160672016803365681
229384362880181440604801512030245047291

A306015 as a square array

01141576455318625487229384
12624120720504040320362880
131260360252020160181440
1420120840672060480
1530210168015120
16423363024
1756504
1872
19
1
01141576455318625487229384
12624120720504040320362880
131260360252020160181440
1420120840672060480
1530210168015120
16423363024
1756504
1872
19
1