21545

Appears in sequences

• Smallest number whose cube has n digits.at n=13A018005
• Smallest number whose sixth power has n digits.at n=26A130080
• Smallest number whose ninth power has at least n digits.at n=39A130083
• a(n) = 4*a(n-1) - 3*a(n-2) + 2*a(n-3) - 1*a(n-4).at n=11A138747
• 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), (0, 1, 1), (1, -1, -1)}.at n=11A148065
• Number of natural numbers between exponents of successive Mersenne primes.at n=28A157891
• Number of n X 2 binary arrays with all 1s connected, a path of 1s from left column to right column, and no 1 having more than two 1s adjacent.at n=14A163723
• Number of 5-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-bishop's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions.at n=14A187609
• Coefficient of x in the reduction of the n-th Fibonacci polynomial by x^3->x^2+1.at n=18A192781
• Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,4,1,3 for x=0,1,2,3,4.at n=5A196311
• Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,4,1,3 for x=0,1,2,3,4.at n=4A196312
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,0,4,1,3 for x=0,1,2,3,4.at n=49A196314
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,0,4,1,3 for x=0,1,2,3,4.at n=50A196314
• Integers k such that Euler(k, 1) is an integer multiple of Bernoulli(k + 1, 1).at n=44A342320