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 A017293 a(n) = 10n+2. 22
 2, 12, 22, 32, 42, 52, 62, 72, 82, 92, 102, 112, 122, 132, 142, 152, 162, 172, 182, 192, 202, 212, 222, 232, 242, 252, 262, 272, 282, 292, 302, 312, 322, 332, 342, 352, 362, 372, 382, 392, 402, 412, 422, 432, 442, 452, 462, 472, 482, 492, 502, 512, 522, 532 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Number of 5 X n 0-1 matrices avoiding simultaneously the right angled numbered polyomino patterns (ranpp) (00;1), (01;0), (11;0) and (01;1). 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 i110*n+2; seq(A017293(n), n=0..100); # Wesley Ivan Hurt, May 03 2014 MATHEMATICA Range[2, 1000, 10] (* Vladimir Joseph Stephan Orlovsky, May 28 2011 *) CoefficientList[Series[(2 + 8 x) / (1 - x)^2, {x, 0, 30}], x] (* Vincenzo Librandi, Jul 23 2016 *) 10 Range[0, 60]+2 (* or *) LinearRecurrence[{2, -1}, {2, 12}, 60] (* Harvey P. Dale, Jul 04 2019 *) PROG (MAGMA) [10*n+2: n in [0..50]]; // Vincenzo Librandi, May 04 2011 CROSSREFS Subsequence of A034709, together with A017281, A139222, A139245, A017329, A139249, A139264, A139279 and A139280. Sequence in context: A191226 A063599 A163479 * A244188 A189330 A120672 Adjacent sequences:  A017290 A017291 A017292 * A017294 A017295 A017296 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Dec 11 1996 STATUS approved

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Last modified October 21 19:29 EDT 2019. Contains 328315 sequences. (Running on oeis4.)