138731

Properties

Appears in sequences

• a(n) = A077710(n+1)/A077710(n).at n=15A077711
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, 1), (1, -1, -1), (1, 1, -1)}.at n=12A148226
• Primes of the Form : p1=a*b+c;p2=a*c+b;p3=b*c+a;p=(p1+p2+p3)/2; p1,p2 and p3 are three consecutive prime numbers.at n=9A157722
• Emirps (A006567) whose difference with the reversal is a perfect square.at n=15A217386
• Prime numbersat n=12906