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 A213776 Antidiagonal sums of the convolution array A213774. 3
 1, 8, 30, 81, 184, 376, 717, 1304, 2294, 3941, 6656, 11104, 18361, 30168, 49342, 80441, 130840, 212472, 344645, 558600, 904886, 1465293, 2372160, 3839616, 6214129, 10056296, 16273182, 26332449, 42608824, 68944696, 111557181 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Clark Kimberling, Table of n, a(n) for n = 1..1000 Index entries for linear recurrences with constant coefficients, signature (4,-5,1,2,-1). FORMULA a(n) = 4*a(n-1) - 5*a(n-2) + a(n-3) + 2*a(n-4) - a(n-5). G.f.: f(x)/g(x), where f(x) = x*(1 + 4*x + 3*x^2) and g(x) = (1 - x - x^2)*(1 - x)^3. a(n) = 6*Fibonacci(n+6) - Lucas(n+5) - 2*n*(2*n+9) - 37. - Ehren Metcalfe, Jul 10 2019 MATHEMATICA (See A213774.) CROSSREFS Cf. A213774, A213500. Sequence in context: A002417 A126858 A232772 * A113751 A107233 A098213 Adjacent sequences:  A213773 A213774 A213775 * A213777 A213778 A213779 KEYWORD nonn,easy AUTHOR Clark Kimberling, Jun 21 2012 STATUS approved

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Last modified September 26 11:44 EDT 2020. Contains 337369 sequences. (Running on oeis4.)