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A131427 as a triangular array

1
01
002
0005
000014
0000042
000000132
0000000429
000000001430
0000000004862
000000000016796
0000000000058786
000000000000208012

A131427 as a square array

1000000000000
100000000000
20000000000
5000000000
1400000000
420000000
132000000
42900000
14300000
4862000
1679600
587860
208012
1000000000000
100000000000
20000000000
5000000000
1400000000
420000000
132000000
42900000
14300000
4862000
1679600
587860
208012