42962

Appears in sequences

• a(0) = 0; a(1)=1; for n>1, a(n) = least positive integer m not among a(1),...,a(n-1) such that |m-a(n-1)| > |a(n-1)-a(n-2)|.at n=42A078783
• Number at end of segment n of A078783.at n=13A117072
• a(n) = 121*n^2 - 38*n + 3.at n=18A157443
• a(n) = A338268(k^2 + 2*n, k) for sufficiently large k.at n=26A338286
• Expansion of e.g.f. 1/(1 + exp(x) - exp(3*x)).at n=5A355408
• Number of 2n-node rooted trees whose height, number of leaves, and number of internal (non-leaf) nodes are all equal.at n=8A358591