28112

Appears in sequences

• a(n) is the concatenation of n and 4n.at n=27A019552
• Number of 3-unbalanced strings of length n (= 2^n - A027557(n)).at n=15A027558
• Trajectory of 3 under map n->33n+1 if n odd, n->n/2 if n even.at n=11A037114
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 1), (0, 0, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.at n=8A150214
• Number of (w,x,y,z) with all terms in {0,...,n} and 2w=max{w,x,y,z}-min{w,x,y,z}.at n=39A212757
• Expansion of 1/(1 - x - x^2/(1 + x^2/(1 + x^3/(1 + x^4/(1 + x^5/(1 + ...)))))), a continued fraction.at n=26A302016
• a(n) = 36*n^2 - 4*n (n>=1).at n=27A304380