26306

Appears in sequences

• Fibonacci sequence beginning 4, 14.at n=17A022383
• 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, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 1, 0)}.at n=9A149150
• Row sums of triangle A166890.at n=5A229113
• Number of cyclic arrangements of S={1,2,...,n} such that the difference between any two neighbors is 2^k for some k=0,1,2,...at n=13A242519
• Numbers k such that (41*10^k + 49)/9 is prime.at n=26A254441
• a(n) = 2*a(n-1) + a(n-2) - 4*a(n-3) + 2*a(n-4) + a(n-5) -2*a(n-6) + a(n-7) for n >= 7, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 11, a(4) = 18, a(5) = 30, a(6) = 47.at n=21A289077
• Number of nX6 0..1 arrays with every element equal to 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=9A300348
• Expansion of e.g.f. 1/(1 - x - log(1 + x)).at n=6A368232