21969

Appears in sequences

• a(n) = n^3 + 17.at n=28A084379
• Row sums of triangle A171840.at n=8A171841
• Numbers k for which 5*k-4, 5*k-2, 5*k+2, and 5*k+4 are primes.at n=38A178082
• Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,2,4 for x=0,1,2,3,4.at n=6A196213
• Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,2,4 for x=0,1,2,3,4.at n=2A196217
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,2,4 for x=0,1,2,3,4.at n=38A196218
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,2,4 for x=0,1,2,3,4.at n=42A196218
• Number of (w,x,y,z) with all terms in {1,...,n} and w <= (geometric mean of x,y,z).at n=15A212143
• Row 5 of A277710: Positions of 5's in A264977; positions of 10's in A277330.at n=42A277715