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A251974 as a triangular array

256
16001600
100002000010000
4000025000025000040000
160000175000062500001750000160000
49000012250000765625007656250012250000490000
1500625600250009378906251500625000937890625

A251974 as a square array

256160010000400001600004900001500625
16002000025000017500001225000060025000
10000250000625000076562500937890625
400001750000765625001500625000
16000012250000937890625
490000

A251974 as an upper right triangle

256160010000400001600004900001500625
16002000025000017500001225000060025000
10000250000625000076562500937890625
400001750000765625001500625000
16000012250000937890625
490000

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Last modified February 25 04:56 EST 2020. Contains 332217 sequences. (Running on oeis4.)