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 A038679 Convolution of A007054 (Super ballot numbers) with A000302 (powers of 4). 2
 3, 14, 59, 242, 982, 3964, 15955, 64106, 257282, 1031780, 4135518, 16569204, 66365964, 265761016, 1064046979, 4259609626, 17050224394, 68241838036, 273110643754, 1092947507356, 4373580244084, 17500703480776 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Also: convolution of A038665 with A000984 (central binomial coefficients ) LINKS Table of n, a(n) for n=0..21. FORMULA a(n) = 4^(n+1) - C(n+1), C(n): Catalan numbers A000108; G.f. c(x)*(4-c(x))/(1-4*x), where c(x) = g.f. for Catalan numbers. CROSSREFS A007054, A000302, A000108, A038665, A000984. Sequence in context: A126875 A110526 A319857 * A151235 A151236 A006224 Adjacent sequences: A038676 A038677 A038678 * A038680 A038681 A038682 KEYWORD easy,nonn AUTHOR Wolfdieter Lang STATUS approved

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Last modified December 8 23:37 EST 2023. Contains 367681 sequences. (Running on oeis4.)