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 A155477 a(n) = 43^(2*n+1). 2
 43, 79507, 147008443, 271818611107, 502592611936843, 929293739471222707, 1718264124282290785243, 3177070365797955661914307, 5874403106360420018879553643, 10861771343660416614908294685907, 20083415214428110320965436874242043 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS 43*a(n) is a square, hence also a(n)^3+(6*a(n))^3+(11*a(n))^3 = 36*43*a(n)^3 is a square. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..100 Index entries for linear recurrences with constant coefficients, signature (1849). FORMULA G.f.: 43/(1-1849*x). - Bruno Berselli, Feb 26 2012 MATHEMATICA 43^(2 Range[0, 11] + 1) (* Harvey P. Dale, Oct 03 2011 *) Table[43^(2 n + 1), {n, 0, 20}] (* Vincenzo Librandi, Oct 01 2015 *) PROG (MAGMA) [43^(2*n+1): n in [0..15]]; // Vincenzo Librandi, Oct 01 2015 (PARI) vector(20, n, n--; 43^(2*n+1)) \\ Altug Alkan, Oct 01 2015 CROSSREFS Bisection of A009987 (powers of 43). Sequence in context: A177488 A262648 A185558 * A212738 A291993 A228546 Adjacent sequences:  A155474 A155475 A155476 * A155478 A155479 A155480 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Jan 23 2009 EXTENSIONS More terms from Harvey P. Dale, Oct 03 2011 Offset from 1 to 0 by Vincenzo Librandi, Feb 26 2012 STATUS approved

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Last modified June 15 13:47 EDT 2021. Contains 345048 sequences. (Running on oeis4.)