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A081658 as a triangular array

1
10
10-1
10-30
10-605
10-100250
10-150750-61
10-2101750-4270
10-2803500-170801385
10-3606300-51240124650
10-45010500-128100623250-50521
10-55016500-2818202285250-5557310
10-66024750

A081658 as a square array

1111111111111
000000000000
-1-3-6-10-15-21-28-36-45-55-66
0000000000
52575175350630105016502475
00000000
-61-427-1708-5124-12810-28182
00000
13851246562325228525
000
-50521-555731
0
1111111111111
000000000000
-1-3-6-10-15-21-28-36-45-55-66
0000000000
52575175350630105016502475
00000000
-61-427-1708-5124-12810-28182
00000
13851246562325228525
000
-50521-555731
0