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 A130855 2n appears 2n+1 times, 2n+1 appears 2n times. 1
 0, 2, 2, 2, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Robert Israel, Table of n, a(n) for n = 0..10000 FORMULA G.f.: (1-x)^(-1)*Sum_{n>=0} (z^(2*n^2+n+1) + z^(2*n^2+3*n+1)). - Robert Israel, Jun 03 2019 MAPLE seq(op([(2*n)\$(2*n+1), (2*n+1)\$(2*n)]), n=0..14); # Robert Israel, Jun 03 2019 MATHEMATICA Table[{PadRight[{}, 2n+1, 2n], PadRight[{}, 2n, 2n+1]}, {n, 0, 10}]//Flatten (* Harvey P. Dale, Aug 01 2017 *) CROSSREFS Sequence in context: A345380 A367128 A028829 * A235963 A100196 A278078 Adjacent sequences: A130852 A130853 A130854 * A130856 A130857 A130858 KEYWORD nonn AUTHOR Paul Curtz, Jul 22 2007 STATUS approved

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Last modified August 5 11:26 EDT 2024. Contains 374950 sequences. (Running on oeis4.)