22877

Properties

Appears in sequences

• Primes of the form sum 6d/(2 + mu(d)) for some k and all d dividing k.at n=34A069548
• Primes p such that q-p = 24, where q is the next prime after p.at n=36A098974
• a(n) = (n^4 + 46*n^3 - 169*n^2 + 146*n + 24)/24.at n=19A143059
• Primes p of the form 4*k+1 for which s=26 is the least positive integer such that s*p-(floor(sqrt(s*p)))^2 is a square.at n=32A145050
• Primes of the form (4*n^2-8*n-9)/3.at n=34A154616
• Primes p0 such that p0+p1+p2-+2 are primes; p0,p1,p2 are three consecutive primes.at n=25A158351
• Primes in the chain of repeated application of x->2*x+3, starting at x=1427.at n=4A163589
• Primes of the form p^2 + (p + 1)/2 where p is also prime.at n=12A164580
• Noncomposite numbers in the eastern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American.at n=22A168022
• Smallest primes p = p(k) with (p(k)+p(k+1)+p(k+2))/15 an integer.at n=17A168556
• Primes p=prime(i) of level (1,4), i.e., such that A118534(i) = prime(i-4).at n=9A216177
• Primes congruent to 11 mod 111.at n=37A252893
• Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.at n=1A253370
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.at n=7A253375
• Number of (2+1) X (n+1) 0..2 arrays with every 2 X 2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.at n=2A253376
• Primes prime(k) such that (prime(k)*prime(k+1)+1)/2 is prime.at n=37A266163
• Expansion of 1/(2 + x - theta_2(sqrt(x))/(2*x^(1/8))), where theta_2() is the Jacobi theta function.at n=55A303908
• Primes p such that A001175(p) = 2*(p+1)/9.at n=17A308786
• Record values in A343717.at n=24A343718
• a(n) = 25*n^2/2 - 11*n/2 + 1.at n=43A383465