30984

Appears in sequences

• Aliquot sequence starting at 552.at n=9A014360
• Numbers k such that k divides the (left) concatenation of all numbers <= k written in base 5 (most significant digit on right and removing all least significant zeros before concatenation).at n=7A029522
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 44.at n=7A031722
• Open 3-dimensional ball numbers (version 3): a(n) is the number of integer points (i,j,k) contained in an open ball of diameter n, centered at (1/2,1/2,0).at n=39A053595
• Record-setting differences between adjacent elements of the Mian-Chowla sequence variant A058335.at n=46A080931
• a(n) = 64*n^2 + 8.at n=21A158488
• Number of ways to place 4 nonattacking kings on a 4 X n board.at n=9A172203
• A symmetrical triangle of polynomial coefficients:p(x,n)=If[n == 0, 1, (1 - x)^(n + 1)*Sum[((2*k + 1)^n + (k + 1)^n + k^n)*x^k, {k, 0, Infinity}]/2].at n=30A177984
• A symmetrical triangle of polynomial coefficients:p(x,n)=If[n == 0, 1, (1 - x)^(n + 1)*Sum[((2*k + 1)^n + (k + 1)^n + k^n)*x^k, {k, 0, Infinity}]/2].at n=33A177984
• The number of grains of sand in the identity element for the 3D sandpile group on an n X n X n cubic grid.at n=19A351379