20377

Appears in sequences

• Numbers k such that k^2+k+8 is a palindrome.at n=6A027724
• Open 3-dimensional ball numbers (version 1): a(n) is the number of integer points (i,j,k) contained in an open ball of diameter n, centered at (0,0,0).at n=34A053592
• Reversion of y - y^2 - y^3 - y^4 - y^5.at n=9A063024
• Number of solutions to x^2 + y^2 + z^2 < n^2; number of lattice points inside a sphere of radius n.at n=17A078183
• Numbers n such that sigma(n)/phi(n) = 36/25.at n=2A164649
• Number of (w,x,y,z) with all terms in {1,...,n} and w<x*y*z.at n=12A212057
• Number of 3X3X3 triangular 0..n arrays with every horizontal row having the same average value.at n=15A214596
• Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order.at n=6A223469
• T(n,k)=Number of nXk 0..2 arrays with no more than floor(nXk/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order.at n=38A223473
• T(n,k)=Number of nXk 0..2 arrays with no more than floor(nXk/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order.at n=42A223473
• Smallest k such that the minimal factor in factorization of k! over distinct terms of A050376 is A050376(n), or a(n) = 0 if there is no such k.at n=16A240905
• Number of partitions p of n such that round(mean(p)) is a part of p; here, round(x) means floor(x + 1/2).at n=40A241733
• a(n) = n * A001353(n).at n=6A317405
• a(n) is the number of edges formed by n-secting the angles of a heptagon.at n=30A335759
• Number of inequivalent tilings of a 4 X n rectangle using integer-sided square tiles.at n=11A359020