52752

Appears in sequences

• Theta series of direct sum of 4 copies of hexagonal lattice.at n=13A008655
• McKay-Thompson series of class 20B for Monster.at n=27A058551
• Numbers n such that phi(sigma(n)) = 5*phi(n).at n=10A067708
• T(n,k) = [x^k] Product_{m=1..n} d/dx Sum_{i=1..m} x^i; triangle read by rows, n >= 0, 0 <= k <= A161680(n).at n=51A139769
• Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 n X 2 array.at n=27A219621
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change (+-,+-) 0,0 1,1 or 1,2.at n=21A263964
• Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change (+-,+-) 0,0 1,1 or 1,2.at n=6A263965
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change (+-,+-) 0,2 1,1 or 1,0.at n=21A263973
• Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=7A306170
• Number of distinct edges among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass.at n=20A359047