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 A164457 Number of binary strings of length n with no substrings equal to 0001, 0011, or 1010. 3
 1, 2, 4, 8, 13, 21, 33, 52, 82, 128, 200, 313, 488, 761, 1188, 1852, 2887, 4503, 7020, 10943, 17063, 26601, 41468, 64652, 100792, 157128, 244965, 381898, 595363, 928166, 1446998, 2255827, 3516797, 5482628, 8547285, 13325053, 20773513, 32385456, 50488278 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..2000 (first 500 terms from R. H. Hardin) Index entries for linear recurrences with constant coefficients, signature (2,-1,2,-3,1). FORMULA G.f.: -(x^7-2*x^6+x^2+1)/((x-1)*(x^4-2*x^3-x+1)). - R. J. Mathar, Jan 19 2011 CROSSREFS Sequence in context: A164429 A073336 A164420 * A164419 A164480 A134035 Adjacent sequences:  A164454 A164455 A164456 * A164458 A164459 A164460 KEYWORD nonn AUTHOR R. H. Hardin, Aug 14 2009 EXTENSIONS Edited by Alois P. Heinz, Oct 12 2017 STATUS approved

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Last modified April 22 11:08 EDT 2021. Contains 343174 sequences. (Running on oeis4.)