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 A131298 A difference of Fibonacci and Padovan numbers. 2
 1, 1, 2, 4, 6, 11, 18, 30, 50, 82, 135, 221, 361, 589, 959, 1560, 2535, 4116, 6679, 10832, 17560, 28457, 46103, 74674, 120928, 195802, 316995, 513148, 830608, 1344372, 2175796, 3521249, 5698477 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Diagonal sums of A104730. LINKS Index entries for linear recurrences with constant coefficients, signature (1,2,0,-2,-1). FORMULA G.f.: (1-x^2)/((1-x-x^2)*(1-x^2-x^3)) = (1+x)/(1-x-x^2) - x*(1+x)/(1-x^2-x^3). a(n) = Sum_{k=0..floor(n/2)} C(n-k+1,k) - C(k,n-2k+1). CROSSREFS Sequence in context: A026636 A026658 A138688 * A168445 A185192 A007053 Adjacent sequences:  A131295 A131296 A131297 * A131299 A131300 A131301 KEYWORD easy,nonn AUTHOR Paul Barry, Jun 26 2007 STATUS approved

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Last modified May 21 15:32 EDT 2019. Contains 323444 sequences. (Running on oeis4.)