A087100 A000225 (2^n - 1) interlaced with A008593 (11n).

0, 1, 11, 3, 22, 7, 33, 15, 44, 31, 55, 63, 66, 127, 77, 255, 88, 511, 99, 1023, 110, 2047, 121, 4095, 132, 8191, 143, 16383, 154, 32767, 165, 65535, 176, 131071, 187, 262143, 198, 524287, 209, 1048575, 220, 2097151, 231, 4194303, 242, 8388607, 253

Offset

0,3

Links

Table of n, a(n) for n=0..46.

Index entries for linear recurrences with constant coefficients, signature (0,4,0,-5,0,2).

Formula

From Chai Wah Wu, Feb 02 2021: (Start)

a(n) = 4*a(n-2) - 5*a(n-4) + 2*a(n-6) for n > 5.

G.f.: x*(22*x^3 + x^2 - 11*x - 1)/((x - 1)^2*(x + 1)^2*(2*x^2 - 1)). (End)

Mathematica

Rest[With[{nn=30}, Riffle[2^Range[0, nn]-1, 11Range[0, nn]]]] (* Harvey P. Dale, Aug 15 2011 *)

Crossrefs

Cf. A063914, A087098, A086848.

Sequence in context: A088653 A317311 A107598 * A298256 A298927 A102380

Adjacent sequences: A087097 A087098 A087099 * A087101 A087102 A087103

Keyword

easy,nonn

Author

Jeremy Gardiner, Aug 10 2003

Status

approved