43030

Appears in sequences

• Numbers k such that sigma(k) = 2*phi(k+1).at n=22A068423
• a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that any six consecutive digits in the sequence sum up to a prime.at n=24A152606
• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,2,1,0,0,0,0 for x=0,1,2,3,4,5,6.at n=5A197851
• Partial sums of A299898.at n=43A299899