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 A094361 Pair-reversal of 1,4,4,16,16... 0
 4, 1, 16, 4, 64, 16, 256, 64, 1024, 256, 4096, 1024, 16384, 4096, 65536, 16384, 262144, 65536, 1048576, 262144, 4194304, 1048576, 16777216, 4194304, 67108864, 16777216, 268435456, 67108864, 1073741824, 268435456, 4294967296, 1073741824 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS a(n)=k^(n/2)(1+k*sqrt(k)-(1-ksqrt(k))(-1)^n)/(2*sqrt(k)), the pair reversal of 1,k,k,k^2,k^2,k^3,k^3,... for k=4. LINKS FORMULA G.f. : (4+x)/(1-4x^2); a(n)=(9*2^n+7(-2)^n)/4. CROSSREFS Cf. A076736. Sequence in context: A062780 A175844 A167343 * A187926 A067425 A188481 Adjacent sequences:  A094358 A094359 A094360 * A094362 A094363 A094364 KEYWORD easy,nonn AUTHOR Paul Barry, Apr 26 2004 STATUS approved

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