23354

Appears in sequences

• a(n) = 4*a(n-1) + 3*a(n-2), a(0) = 1, a(1) = 2.at n=7A108851
• Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=8*i and -8<p(i)-p(i-1)<=8.at n=4A180913
• G.f.: (1 + 5*x + 5*x^2 + x^3)/Product_{i=1..10} (1 - x^i).at n=28A256977
• a(n) is the position of the first occurrence of 2n as a local minimum in the prime gaps (A001223).at n=13A286711
• Expansion of g.f. A(x) satisfying 1 = Sum_{n=-oo..+oo} (-1)^n * x^n * (A(x) + x^(3*n-1))^(n+1).at n=15A363143
• Triangle read by rows: T(n,k) is the number of coalescent histories for an n-leaf caterpillar species tree and an identically labeled k-pseudocaterpillar gene tree, 3 <= k <= n.at n=40A380766