a(n)=-a(n-1)+2a(n-2), a(0)=1,a(1)=2.
1, 2, 0, 4, 4, 12, 20, 44, 84, 172, 340, 684, 1364, 2732, 5460, 10924, 21844
2 seqfan posts
Sat Dec 5 10:09:05 CET 2009 [seqfan] Re: A001045 General form: k=2^n-k
Sat Dec 5 04:05:23 CET 2009 [seqfan] A001045 General form: k=2^n-k
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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