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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A027146 a(n) = A027144(2n, n-1). 0 1, 8, 30, 224, 880, 6656, 27104, 206336, 859392, 6565888, 27765760, 212615168, 908943360, 6970998784, 30045757440, 230691307520, 1000634122240, 7689454223360, 33522958204928, 257783270211584, 1128501249835008, 8682602001072128, 38141362595430400, 293587672402755584 (list; graph; refs; listen; history; text; internal format) OFFSET 1,2 LINKS Table of n, a(n) for n=1..24. CROSSREFS Sequence in context: A215471 A221145 A098741 * A302409 A226968 A303679 Adjacent sequences: A027143 A027144 A027145 * A027147 A027148 A027149 KEYWORD nonn AUTHOR Clark Kimberling EXTENSIONS More terms from Sean A. Irvine, Oct 24 2019 STATUS approved

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Last modified August 19 07:08 EDT 2024. Contains 375284 sequences. (Running on oeis4.)