65921

Properties

Appears in sequences

• Numbers k such that k^2 is palindromic in base 4.at n=27A029986
• a(n) = 4^(n+1) + 3*2^n + 1.at n=8A036562
• Let p run through the primes; write p in base 10 and then interpret it in base 128 getting a number q; if q is prime then adjoin q to the sequence.at n=20A090718
• Number of 2-connected (or biconnected) graphs on n nodes with chromatic number 2.at n=11A126750
• Primes of the form 2^(2^k)+385.at n=3A160030
• Noncomposite numbers in the southern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American.at n=29A168027
• Number of pieces after a sheet of paper is folded n times and cut diagonally.at n=17A257418
• a(0)=3; for n > 0, a(n) = 2^(2*n) + 3*2^(n-1) + 1.at n=8A343176
• Prime numbersat n=6583