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A250002 as a triangular array

0
00
000
0000
00000
000000
0012100
00288200
004213621400
0074711411447700
001193306453306931100
0016168730152615267301681600

A250002 as a square array

000000000000
00000000000
000012471116
00028214793168
001836114306730
002211144531526
004473061526
00793730
0011168
0016
00
0
000000000000
00000000000
000012471116
00028214793168
001836114306730
002211144531526
004473061526
00793730
0011168
0016
00
0