66361

Properties

Appears in sequences

• Half-quartan primes: primes of the form p = (x^4 + y^4)/2.at n=21A002646
• Sum of composite numbers between prime p and nextprime(p) is palindromic.at n=38A054266
• Sum of composite numbers between prime p and nextprime(p) is palindromic with restriction 'p + 1 <> sum'.at n=26A054267
• Sums of the form (twin primes + 1) which are also an upper twin prime.at n=11A158870
• Rectangular array, read by antidiagonals, where row e.g.f.s, R(n,x), satisfy: d/dx log( R(n,x) ) = R(n+1,x)^(2^n) with R(n,0) = 1; that is, the logarithmic derivative of the e.g.f. of row n equals the e.g.f. of row n+1 to the 2^n power, for n>=0.at n=33A159314
• E.g.f. A(x) satisfies: d/dx log(A(x)) = A(2*x)^2.at n=5A159316
• Primes p of the form p = 1 + 840*k for some k.at n=32A217862
• Centered 21-gonal primes.at n=16A276261
• Primes of the form x^2 + y^2 with x > y such that x^2 - y^2 is a square and x^4 + y^4 is a prime.at n=6A282867
• Prime numbersat n=6618