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 A299017 Intersection of A264041 and A000217. 1
 1, 3, 6, 10, 21, 36, 55, 78, 105, 136, 171, 210, 253, 300, 351 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA Conjectures (Start) G.f.: x*(1 + 6*x^4 - 3*x^5) / (1 - x)^3. a(n) = 6 - 7*n + 2*n^2 for n>3. a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n>3. (End) CROSSREFS Cf. A000217, A264041. Sequence in context: A068855 A068882 A076713 * A136569 A061883 A027671 Adjacent sequences:  A299014 A299015 A299016 * A299018 A299019 A299020 KEYWORD nonn,more AUTHOR Colin Barker, Jan 31 2018 STATUS approved

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Last modified January 25 06:44 EST 2022. Contains 350565 sequences. (Running on oeis4.)