28667

Appears in sequences

• Main diagonal of array in A083140.at n=28A083141
• 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, -1, 0), (-1, 0, 1), (0, 0, 1), (1, -1, -1), (1, 1, -1)}.at n=10A148379
• Expansion of (1 - x + 5x^2)/((1-x)*(1-2x)).at n=13A154118
• a(n) = Fibonacci(n + 2) + floor(n/2).at n=21A167270
• Number of real integers in n-th generation of tree T(4i) defined in Comments.at n=23A274163
• Number of permutations w in S_n that form Boolean intervals [s, w] in the Bruhat order for every simple reflection s in the support of w.at n=11A331347
• Position of 30^n among 5-smooth numbers A051037.at n=17A372400