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A299017 Intersection of A264041 and A000217. 1

%I

%S 1,3,6,10,21,36,55,78,105,136,171,210,253,300,351

%N Intersection of A264041 and A000217.

%F Conjectures (Start)

%F G.f.: x*(1 + 6*x^4 - 3*x^5) / (1 - x)^3.

%F a(n) = 6 - 7*n + 2*n^2 for n>3.

%F a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n>3.

%F (End)

%Y Cf. A000217, A264041.

%K nonn,more

%O 1,2

%A _Colin Barker_, Jan 31 2018

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Last modified May 20 20:15 EDT 2022. Contains 353876 sequences. (Running on oeis4.)