A227548 - OEIS

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A227548 as a simple table

n	a(n)
1	1
2	50
3	56
4	60
5	90
6	4900
7	5100
8	7500
9	7600
10	9900
11	12500
12	499000
13	501000
14	624000
15	625000
16	749000
17	751000
18	875000
19	999000
20	1249000
21	13427757
22	49990000
23	50010000
24	56250000
25	62490000

[1,50,56,60,90,4900,5100,7500,7600,9900,12500, 499000,501000,624000,625000,749000,751000,875000, 999000,1249000,13427757,49990000,50010000, 56250000,62490000]