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A109977 as a triangular array

1
-21
4-31
-1511-51
107-7635-91
-14751041-476125-171
40914-2885813177-3460479-331
-23270191641270-749336196731-272601901-651
271813931-19171288887527566-229792423184213-2221967655-1291
-6493043931545796039830

A109977 as a square array

1-24-15107-147540914-2327019271813931-64930439315
1-311-761041-288581641270-19171288845796039830
1-535-47613177-74933687527566
1-9125-3460196731-22979242
1-17479-272603184213
1-331901-222196
1-657655
1-129
1

A109977 as an upper right triangle

1-24-15107-147540914-2327019271813931-64930439315
1-311-761041-288581641270-19171288845796039830
1-535-47613177-74933687527566
1-9125-3460196731-22979242
1-17479-272603184213
1-331901-222196
1-657655
1-129
1

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Last modified July 11 20:03 EDT 2020. Contains 335652 sequences. (Running on oeis4.)