20748

Appears in sequences

• Maximal sum of inverse squares of the singular values of triangular anti-Hadamard matrices of order n.at n=11A005313
• a(n+1) = Sum_{k=0..sqrt(n)} a(k) * a(n-k).at n=15A030041
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 24.at n=11A031702
• Sums of distinct powers of 12.at n=18A033048
• Wiener number of n-hexagonal triangle.at n=7A033544
• Sums of 2 distinct powers of 12.at n=7A038492
• Base-9 palindromes that start with 3.at n=33A043030
• Given n colors, sequence gives number of ways to color the vertices of a square such that no edge has the same color on both of its vertices.at n=12A091940
• Least perimeter common to 2^n primitive arithmetic triangles, i.e., Heronian triangles whose sides are in arithmetic progression.at n=3A095267
• Average of twin-prime pairs for pairs that are expressible as the sum of two triangular numbers.at n=39A117313
• Primitive elements of A096490.at n=14A118671
• Area common to integer-sided isosceles triangles (x,x,y) and (x,x,z=y+2d), sorted on x > z/2, d being positive.at n=32A120644
• Multiples of 1729, the Hardy-Ramanujan number.at n=12A138129
• a(n) = 576*n^2 + 2*n.at n=5A158369
• a(n) = 144*n^2 + 12.at n=12A158546
• a(n) = n*(2*n^2 + 5*n + 1).at n=21A163832
• Number of n X 2 1..4 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nonincreasing order.at n=9A166826
• a(n) = gcd(Catalan(n), n!).at n=34A170829
• Numbers that are the sum of two powers of 12.at n=11A194887
• Number of n X 3 0..2 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.at n=40A201272