29678

Appears in sequences

• a(n) is the sum of the preceding terms that are coprime to n.at n=28A082865
• Integers n such that 6n, 36n, and 216n fall between pairs of twin primes, that is, 6n-1, 6n+1, 36n-1, 36n+1, 216n-1, and 216n+1 are prime.at n=16A192851
• Number of (n+2)X3 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally exactly one way.at n=1A204600
• Number of (n+2)X4 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally exactly one way.at n=0A204601
• T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally exactly one way.at n=1A204607
• T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally, vertically or nw-to-se diagonally exactly one way.at n=2A204607
• a(n) is the least k > n such that n divides k, and n+1 divides k+1, and n+2 divides k+2.at n=37A295388
• a(n) = (-2 - (-1)^n*(-2 + n) + n + 2*n^3)/4.at n=39A323723