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A171996 as a triangular array

1
-11
2-31
011-61
0-2035-101
040-13585-151
00490-525175-211
00-11202905-1540322-281
002240-1260011865-3780546-361
00047600-7654538325-8190870-451

A171996 as a square array

1-120000000
1-311-20400000
1-635-135490-112022400
1-1085-5252905-1260047600
1-15175-154011865-76545
1-21322-378038325
1-28546-8190
1-36870
1-45
1
1-120000000
1-311-20400000
1-635-135490-112022400
1-1085-5252905-1260047600
1-15175-154011865-76545
1-21322-378038325
1-28546-8190
1-36870
1-45
1