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A037156 as a simple table

na(n)
01
155
25050
3500500
450005000
55000050000
6500000500000
750000005000000
85000000050000000
9500000000500000000
1050000000005000000000
115000000000050000000000
12500000000000500000000000
1350000000000005000000000000
145000000000000050000000000000

[1,55,5050,500500,50005000,5000050000,
 500000500000,50000005000000,5000000050000000,
 500000000500000000,50000000005000000000,
 5000000000050000000000,500000000000500000000000,
 50000000000005000000000000,
 5000000000000050000000000000]