30324

Appears in sequences

• Least k such that k and 4k are anagrams in base n (written in base 10).at n=15A023096
• Number of n-celled polyzebras with bilateral symmetry.at n=10A093991
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, 0), (-1, 1), (0, -1), (1, 0)}.at n=12A151501
• Auxiliary r(n) sequence used to prove some properties about Rowland's sequence: r(1) = 1, and r(n) = 1/2*(c(n)+1), where c(n) is A190894, for n>1.at n=39A190895
• Area A of the triangles such that A, the sides and one of the altitudes are four consecutive integers of an arithmetic progression d.at n=18A210645
• a(n) = (4*n+8)*n^2.at n=19A258617
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 601", based on the 5-celled von Neumann neighborhood.at n=30A272824
• Smallest area of triangle with integer sides and area = n times perimeter.at n=37A289155
• Triangle, read by rows, where the g.f. of row n equals Product_{k=0..n-1} (1 + (2*k+1)*x + x^2) for n>0 with a single '1' in row 0.at n=41A291845
• Triangle, read by rows, where the g.f. of row n equals Product_{k=0..n-1} (1 + (2*k+1)*x + x^2) for n>0 with a single '1' in row 0.at n=43A291845
• A diagonal of irregular triangle A291845.at n=5A291847
• Positions k where A348733(k) is not multiplicative.at n=31A348740
• E.g.f. satisfies log(A(x)) = x^3/6 * (exp(x*A(x)) - 1) * A(x).at n=9A356963
• Numbers that are divisible by the square of the sum of the squares of their digits.at n=28A379980
• Nonmultiples of 10 that are divisible by the square of the sum of the squares of their digits.at n=3A379982