A061377 - OEIS

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A061377 as a simple table

n	a(n)
1	1
2	3
3	13
4	107
5	1725
6	55307
7	3541373
8	453351051
9	116061410429
10	59423895490699
11	60850185043886205
12	124621238393774438539
13	510448653311085144141949
14	4181595492545647894585284747
15	68511261060316548415970449436797

[1,3,13,107,1725,55307,3541373,453351051, 116061410429,59423895490699,60850185043886205, 124621238393774438539,510448653311085144141949, 4181595492545647894585284747, 68511261060316548415970449436797]