A042358 - OEIS

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A042358 as a simple table

n	a(n)
0	26
1	27
2	53
3	186
4	4889
5	14853
6	19742
7	34595
8	1818682
9	1853277
10	3671959
11	12869154
12	338269963
13	1027679043
14	1365949006
15	2393628049
16	125834607554
17	128228235603
18	254062843157
19	890416765074
20	23404898735081

[26,27,53,186,4889,14853,19742,34595,1818682, 1853277,3671959,12869154,338269963,1027679043, 1365949006,2393628049,125834607554,128228235603, 254062843157,890416765074,23404898735081]