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A164467 Number of binary strings of length n with no substrings equal to 0001 0100 or 1101 1
13, 20, 31, 48, 74, 113, 172, 261, 396, 600, 909, 1376, 2083, 3152, 4770, 7217, 10920, 16521, 24996, 37816, 57213, 86556, 130951, 198112, 299722, 453441, 686004, 1037837, 1570124, 2375400, 3593693, 5436808, 8225227, 12443744, 18825858 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,1
LINKS
FORMULA
G.f. -x^4*(-13+6*x+9*x^2-12*x^3+8*x^4) / ( (x-1)*(x^4-x^3+x^2+x-1) ). - R. J. Mathar, Jan 19 2011
CROSSREFS
Sequence in context: A164468 A164489 A164464 * A164505 A164484 A164502
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 14 2009
STATUS
approved

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Last modified March 19 07:21 EDT 2024. Contains 370955 sequences. (Running on oeis4.)