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 A099041 Number of 3 X n 0-1 matrices avoiding simultaneously the right angled numbered polyomino patterns (ranpp) (00;1), (10;0) and (10;1). 0
 1, 8, 24, 58, 128, 270, 556, 1130, 2280, 4582, 9188, 18402, 36832, 73694, 147420, 294874, 589784, 1179606, 2359252, 4718546, 9437136, 18874318, 37748684, 75497418, 150994888, 301989830, 603979716, 1207959490, 2415919040, 4831838142, 9663676348, 19327352762 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS An occurrence of a ranpp (xy;z) in a matrix A=(a(i,j)) is a triple (a(i1,j1), a(i1,j2), a(i2,j1)) where i10. PROG (PARI) vector(50, n, 9*2^n - 2*n - 8) \\ Michel Marcus, Dec 01 2014 CROSSREFS Cf. A054127. Sequence in context: A256052 A159741 A302489 * A306056 A129959 A256533 Adjacent sequences:  A099038 A099039 A099040 * A099042 A099043 A099044 KEYWORD nonn,easy AUTHOR Sergey Kitaev, Nov 13 2004 EXTENSIONS a(0)=1 prepended by Alois P. Heinz, Dec 21 2018 STATUS approved

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Last modified January 18 07:18 EST 2019. Contains 319269 sequences. (Running on oeis4.)