

A032090


"BHK" (reversible, identity, unlabeled) transform of 0,1,1,1...


1



0, 1, 1, 1, 2, 2, 4, 5, 10, 14, 26, 39, 69, 107, 183, 289, 484, 772, 1276, 2047, 3356, 5402, 8812, 14213, 23113, 37325, 60581, 97905, 158718, 256622, 415716, 672337, 1088662, 1760998, 2850646, 4611643, 7463885, 12075527
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OFFSET

1,5


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000
C. G. Bower, Transforms (2)
Index to sequences with linear recurrences with constant coefficients, signature (2,1,3,1,1,0,1).


FORMULA

G.f.: x^2*(x^6+x^5x^4+2*x^32*x^2x+1) / ((x1)*(x^2+x1)*(x^4+x^21)). [Colin Barker, Dec 07 2012]


MATHEMATICA

CoefficientList[Series[ x (x^6 + x^5  x^4 + 2 x^3  2 x^2  x + 1)/((x  1) (x^2 + x  1) (x^4 + x^2  1)), {x, 0, 40}], x] (* Vincenzo Librandi, Oct 19 2013 *)


CROSSREFS

For n>2, a(n) = A032089(n1) + [n even], a(2n) = A032097(n1).
Sequence in context: A222006 A127712 A178113 * A000014 A114851 A099364
Adjacent sequences: A032087 A032088 A032089 * A032091 A032092 A032093


KEYWORD

nonn,easy


AUTHOR

Christian G. Bower


STATUS

approved



