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 A017114 a(n) = (8*n + 4)^2. 2
 16, 144, 400, 784, 1296, 1936, 2704, 3600, 4624, 5776, 7056, 8464, 10000, 11664, 13456, 15376, 17424, 19600, 21904, 24336, 26896, 29584, 32400, 35344, 38416, 41616, 44944, 48400, 51984, 55696 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS a(n) = 16*A016754; a(n+2) = A061042(2n+1), from Brackett spectrum of hydrogen. - Paul Curtz, Nov 07 2008 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..10000 Index entries for linear recurrences with constant coefficients, signature (3, -3, 1). FORMULA G.f.: -16*(1 + 6*x + x^2)/(x-1)^3. - R. J. Mathar, Jul 14 2016 MATHEMATICA LinearRecurrence[{3, -3, 1}, {16, 144, 400}, 30] (* Ray Chandler, Aug 04 2015 *) PROG (MAGMA) [(8*n+4)^2: n in [0..35] ]; // Vincenzo Librandi, Jul 21 2011 (PARI) a(n)=(8*n+4)^2 \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Sequence in context: A303145 A213349 A032444 * A092820 A060300 A128985 Adjacent sequences:  A017111 A017112 A017113 * A017115 A017116 A017117 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified May 24 15:25 EDT 2019. Contains 323532 sequences. (Running on oeis4.)