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 A171473 a(n) = 6*a(n-1) - 8*a(n-2)-3 for n > 1; a(0) = 35, a(1) = 135. 12
 35, 135, 527, 2079, 8255, 32895, 131327, 524799, 2098175, 8390655, 33558527, 134225919, 536887295, 2147516415, 8590000127, 34359869439, 137439215615, 549756338175, 2199024304127, 8796095119359, 35184376283135 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Related to Reverse and Add trajectory of 22 in base 2: A061561(4*n+3) = 3*a(n). a(n) = A092431(n+3). a(n+1) - a(n) = A049775(n+5). LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..500 Index entries for linear recurrences with constant coefficients, signature (7,-14,8). FORMULA a(n) = 32*4^n + 4*2^n - 1. G.f.: (35-110*x+72*x^2)/((1-x)*(1-2*x)*(1-4*x)). PROG (PARI) {m=20; v=concat([35, 135], vector(m-2)); for(n=3, m, v[n]=6*v[n-1]-8*v[n-2]-3); v} (MAGMA) [32*4^n+4*2^n-1: n in [0..30]]; // Vincenzo Librandi, Jul 18 2011 CROSSREFS Cf. A061561, A092431, A049775, A171470, A171471, A171472. Sequence in context: A039522 A044367 A044748 * A158586 A267565 A220014 Adjacent sequences:  A171470 A171471 A171472 * A171474 A171475 A171476 KEYWORD nonn,easy AUTHOR Klaus Brockhaus, Dec 09 2009 STATUS approved

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Last modified October 17 22:41 EDT 2019. Contains 328134 sequences. (Running on oeis4.)