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A174712 as a triangular array

1
01
002
0003
00005
000007
00000011
000000015
0000000022
00000000030
000000000042
0000000000056
00000000000077

A174712 as a square array

1000000000000
100000000000
20000000000
3000000000
500000000
70000000
11000000
1500000
220000
30000
4200
560
77
1000000000000
100000000000
20000000000
3000000000
500000000
70000000
11000000
1500000
220000
30000
4200
560
77