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 A306743 Main diagonal of the array A306741. 2
 1, 1, 2, 2, 4, 2, 4, 6, 4, 6, 6, 4, 10, 6, 6, 12, 6, 8, 12, 10, 12, 12, 12, 8, 16, 12, 12, 24, 6, 8, 24, 10, 12, 24, 12, 16, 24, 16, 20, 24, 20, 22, 24, 22, 24, 24, 24, 16, 28, 24, 24, 48, 6, 8, 48, 10, 12, 48, 12, 16, 48, 16, 20, 48, 20, 22, 48, 24, 24, 48 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS This sequence shows a chaotic behavior. Empirically, a(n) is even for any n > 2. LINKS Rémy Sigrist, Table of n, a(n) for n = 1..10000 Rémy Sigrist, C++ program for A306743 FORMULA a(n) = A306741(n, n). EXAMPLE a(3) = A306741(3, 3) = 2. PROG (C++) See Links section. CROSSREFS Cf. A005185, A306741. Sequence in context: A059214 A091820 A171922 * A140821 A063789 A106264 Adjacent sequences:  A306740 A306741 A306742 * A306744 A306745 A306746 KEYWORD nonn AUTHOR Rémy Sigrist, Mar 07 2019 STATUS approved

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Last modified August 5 08:44 EDT 2021. Contains 346464 sequences. (Running on oeis4.)