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A181738 as a triangular array

1
11
-221
-8-631
-8-32-1241
16-40-80-2051
6496-120-160-3061
64448336-280-280-4271
-1285121792896-560-448-5681
-512-1152230453762016-1008-672-7291
-512-5120-57607680134404032-1680-960-90101

A181738 as a square array

11-2-8-8166464-128-512-512
12-6-32-4096448512-1152-5120
13-12-80-12033617922304-5760
14-20-160-28089653767680
15-30-280-560201613440
16-42-448-10084032
17-56-672-1680
18-72-960
19-90
110
1
11-2-8-8166464-128-512-512
12-6-32-4096448512-1152-5120
13-12-80-12033617922304-5760
14-20-160-28089653767680
15-30-280-560201613440
16-42-448-10084032
17-56-672-1680
18-72-960
19-90
110
1