A042506 - OEIS

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A042506 as a simple table

n	a(n)
0	27
1	28
2	503
3	531
4	1034
5	1565
6	8859
7	10424
8	19283
9	87556
10	106839
11	194395
12	1078814
13	1273209
14	2352023
15	3625232
16	63980967
17	67606199
18	3714715713
19	3782321912
20	68014188217
21	71796510129
22	139810698346

[27,28,503,531,1034,1565,8859,10424,19283,87556, 106839,194395,1078814,1273209,2352023,3625232, 63980967,67606199,3714715713,3782321912, 68014188217,71796510129,139810698346]