17968

Appears in sequences

• Pseudoprimes to base 33.at n=40A020161
• a(n) = floor((n^3)/2).at n=33A036487
• Number of permutations of length n which avoid the patterns 1342, 3421, 4312.at n=9A116838
• Number of partitions of n minus number of divisors of n.at n=35A144300
• Number of line segments connecting exactly 3 points in an n X n grid of points.at n=21A177719
• Floor(1/{(8+n^4)^(1/4)}), where {}=fractional part.at n=32A184632
• Position where 10^n-1 occurs in the Kaprekar sequence A006886.at n=37A193992
• Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two or four distinct values for every i,j,k<=n.at n=10A211721
• Number of nX2 0..2 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.at n=4A223072
• T(n,k)=Number of nXk 0..2 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.at n=16A223074
• T(n,k)=Number of nXk 0..2 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.at n=19A223074
• Number of non-sphere-homeomorphic crossing optimal 2-page book drawings of complete graph K_{2n+1}.at n=11A226917
• Number of (4+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=12A253701
• a(n) = 4*n^3 - 6*n^2 + 3*n - 1.at n=16A268201
• Sum over all partitions of n of the number of distinct parts i of multiplicity i+1.at n=43A276434
• Number of nX2 0..1 arrays with no 1 equal to more than one of its king-move neighbors, with the exception of exactly two elements.at n=9A282832
• Number of integer partitions of n whose product of parts is not n.at n=36A379736