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A181501 as a triangular array

0
10
000
0000
00200
1000000
0400000
280480000
0092000000
08272561600000
09634424044000000

A181501 as a square array

0100010028000
00000400896
00200492272344
00008056240
000001644
000000
00000
0000
000
00
0
0100010028000
00000400896
00200492272344
00008056240
000001644
000000
00000
0000
000
00
0