References to A030195

a(n) = 3*a(n-1)+3*a(n-2), a(0)=0, a(1)=1.
0, 1, 3, 12, 45, 171, 648, 2457, 9315, 35316, 133893, 507627, 1924560, 7296561


2 seqfan posts

Fri Mar 11 13:57:44 CET 2011    [seqfan] Re: Period lengths of k^2 mod n not in OEIS ?
Sun Jan 11 23:36:02 CET 2009    [seqfan] Index of linear recurrences

Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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