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 A083319 4^n+3^n-2^n. 2
 1, 5, 21, 83, 321, 1235, 4761, 18443, 71841, 281315, 1106601, 4369403, 17304561, 68694995, 273202041, 1088057963, 4337948481, 17308878275, 69106635081, 276039644123, 1102997363601, 4408504767155, 17623562909721, 70462878967883 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Binomial transform of A083318 LINKS Index entries for linear recurrences with constant coefficients, signature (9,-26,24). FORMULA a(n)=4^n+3^n-2^n. G.f. (1-4x+2x^2)/((1-2x)(1-3x)(1-4x)). E.g.f. exp(4x)+exp(3x)-exp(2x) MATHEMATICA CoefficientList[Series[(1-4x+2x^2)/((1-2x)(1-3x)(1-4x)), {x, 0, 40}], x]  (* Harvey P. Dale, Mar 28 2011 *) CROSSREFS Cf. A083320. Sequence in context: A216271 A026017 A132310 * A146041 A146585 A215008 Adjacent sequences:  A083316 A083317 A083318 * A083320 A083321 A083322 KEYWORD easy,nonn AUTHOR Paul Barry, Apr 25 2003 STATUS approved

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Last modified October 20 10:00 EDT 2020. Contains 337900 sequences. (Running on oeis4.)