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A164499 Number of binary strings of length n with no substrings equal to 0010 0110 or 1101 1
13, 21, 33, 51, 79, 122, 188, 289, 443, 678, 1037, 1586, 2426, 3711, 5676, 8680, 13272, 20292, 31025, 47436, 72529, 110896, 169557, 259245, 396371, 606028, 926583, 1416697, 2166058, 3311792, 5063556, 7741905, 11836953, 18098061, 27670963 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

LINKS

R. H. Hardin, Table of n, a(n) for n = 4..500

Index entries for linear recurrences with constant coefficients, signature (3,-3,1,0,1,-1).

FORMULA

G.f. -x^4*(-13+18*x-9*x^2-2*x^3-4*x^4+8*x^5) / ( (x-1)*(x^5-x^2+2*x-1) ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164424 A164450 A164461 * A164442 A164488 A164436

Adjacent sequences: A164496 A164497 A164498 * A164500 A164501 A164502

KEYWORD

nonn,easy

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified November 27 19:48 EST 2022. Contains 358406 sequences. (Running on oeis4.)