a(n) = 20a(n-1) - a(n-2).
1, 10, 199, 3970, 79201, 1580050, 31521799, 628855930, 12545596801
2 seqfan posts
Sun Nov 14 22:42:15 CET 2010 [seqfan] OEIS: what went wrong
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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