40427

Properties

Appears in sequences

• The $620 prime list.at n=15A018188
• Primes of form p = 2 + Sum_{k = 1..m} k^2 for some m.at n=11A065244
• Magnanimous primes: primes with the property that inserting a "+" in any place between two digits yields a sum which is prime.at n=50A089392
• a(n) = n^3 - 2*n^2 + 2.at n=34A100109
• Numerators of partial sums of a series for 1/sqrt(2).at n=9A123746
• Least k>p such that (kp)^3 divides (p-1)^(kp)^2+1 for prime p = A000040(n).at n=8A128677
• The lesser of twin primes p such that p*q+a+b+c are also the lesser of twin primes, (p and q are twin primes, p+2=q, a=p-1,b=(p+q)/2,c=q+1).at n=33A168536
• For prime p=A000040(n), the smallest prime divisor of (p-1)^p+1 other than p.at n=7A177996
• Primes of the form 7n^2 - 5.at n=16A201851
• Primes whose binary reversal is a square.at n=34A226019
• Primes of the form T(k) + S(k) + 1 where T(k) is the k-th triangular number and S(k) is the k-th square number.at n=33A229080
• Primes p in prime triples (p, p+2, p+6) at the end of the maximal gaps in A201598.at n=12A233434
• Lesser of twin primes of (29n + 1, 29n + 3).at n=21A248620
• a(n) is the smallest lesser twin prime p from A001359 such that the distance to the previous lesser twin prime is 6*n.at n=45A340573
• Primes that yield a prime when any single digit is replaced by its 10's complement.at n=31A345529
• Square array read by antidiagonals in ascending order where T(n,k), n>1 and k>=1, is the least prime p, written in base n, starting a run of exactly k consecutive primes with non increasing sum of digits.at n=33A376893
• Number of inequivalent n X 4 nonnegative integer arrays with row sums 4 and column sums n up to permutations of rows and columns.at n=9A377062
• Primes having only {0, 2, 4, 7} as digits.at n=40A386047
• Prime numbersat n=4238