151313

Appears in sequences

• Strong pseudoprimes to base 35.at n=27A020261
• Strong pseudoprimes to base 77.at n=28A020303
• a(1) = 2; a(n) = half of the a(n-1)-th even nontotient number.at n=14A072416
• a(n) = (n*3^(n+1)+((5*3^(n+1)+(-1)^(n))/4))/4.at n=9A191008
• Principal diagonal of the convolution array A213558.at n=5A213559
• Greatest integer k such that k/2^n < Euler's constant (0.577216...).at n=18A293352