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A259879 as a triangular array

1
1-1
1-32
1-617-18
1-1059-170168
1-15145-7651954-1920
1-21295-241511224-2708425920
1-28532-616044359-190372438948-418320

A259879 as a square array

11111111
-1-3-6-10-15-21-28
21759145295532
-18-170-765-2415-6160
16819541122444359
-1920-27084-190372
25920438948
-418320
11111111
-1-3-6-10-15-21-28
21759145295532
-18-170-765-2415-6160
16819541122444359
-1920-27084-190372
25920438948
-418320