19949

Properties

Appears in sequences

• Number of Twopins positions.at n=24A005689
• Primes p such that p-12, p and p+12 are consecutive primes.at n=17A053072
• Fifth term of weak prime quintets: p(m-3)-p(m-4) < p(m-2)-p(m-3) < p(m-1)-p(m-2) < p(m)-p(m-1).at n=46A054827
• a(n) = ((9*n^2 + 33*n + 26)*2^n + (-1)^n)/27.at n=9A102841
• Primes with digit sum = 32.at n=13A106768
• Squares of the norms of Gaussian primes from A107629.at n=36A107630
• Chen primes p such that their p + 2 counterpart is a Sarrus number (pseudoprime to base 2).at n=5A109994
• Sequence of Chen primes of the form (x*n+1)*(y*n+1)-2 in the order generated by A112229.at n=34A112230
• Records in A134204.at n=32A133244
• Numbers k such that A098572(k) - A098572(k-1) = 2.at n=49A133497
• Primes p1 such that p1^2+p2^3=pp are average of twin primes. p1 and p2 consecutive primes, p1 < p2.at n=20A138715
• Primes congruent to 7 mod 59.at n=35A142734
• Primes congruent to 2 mod 61.at n=36A142800
• Primes p such that continued fraction of (1+sqrt(p))/2 has period 5 : primes in A146330.at n=35A146350
• Lesser of pseudo twin primes to base 2.at n=17A192297
• Primes q = 4*p+1, where p == 2 (mod 5) is also prime.at n=34A221981
• Primes with the property that the sum of the cubes of their digits plus the prime equals another prime squared.at n=4A228195
• Primes which are the average of the two adjacent primes and also of the two adjacent squarefree numbers.at n=21A245589
• Primes having only {1, 4, 9} as digits.at n=38A260271
• p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = (1 - S^2).at n=29A289918