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A051338 as a triangular array

1
-61
42-131
-336146-211
3024-1650335-301
-3024019524-5000635-401
332640-24500474524-119851075-511
-39916803272688-1139292218344-248851687-631
51891840-4653662418083484-3977764541849-468162506-761

A051338 as a square array

1-642-3363024-30240332640-399168051891840
1-13146-165019524-2450043272688-46536624
1-21335-500074524-113929218083484
1-30635-11985218344-3977764
1-401075-24885541849
1-511687-46816
1-632506
1-76
1
1-642-3363024-30240332640-399168051891840
1-13146-165019524-2450043272688-46536624
1-21335-500074524-113929218083484
1-30635-11985218344-3977764
1-401075-24885541849
1-511687-46816
1-632506
1-76
1