18047

Properties

Appears in sequences

• Primes p whose period of reciprocal equals (p-1)/7.at n=15A056212
• Prime quadruples: 3rd term.at n=16A136721
• Primes congruent to 27 mod 53.at n=38A142557
• Primes congruent to 52 mod 59.at n=39A142779
• Primes congruent to 52 mod 61.at n=34A142850
• First of two sequences bisecting the second differences of the partition numbers (see A053445).at n=29A160644
• Primes p such that (p^2+3*p-3) and (p^3+3*p^2-3) are also prime.at n=40A174259
• Primes of the form 2n^2 - 3.at n=24A201712
• Number of (n+1)X(n+1) -4..4 symmetric matrices with every 2X2 subblock having sum zero and one, two or three distinct values.at n=7A211494
• Primes p with q = p + 2 and prime(q) + 2 both prime.at n=34A236457
• a(n+1) is the smallest prime > a(n) such that the digits of a(n) are all (with multiplicity) contained in the digits of a(n+1), with a(1)=7.at n=10A242907
• Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.at n=4A252134
• Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.at n=2A252136
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.at n=23A252139
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 4 6 or 7.at n=25A252139
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.at n=23A252295
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.at n=25A252295
• Primes of the form 11*k^2-11*k+7.at n=19A267290
• Smallest primes of 4 X 4 semimagic squares formed from consecutive primes.at n=34A270865
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 587", based on the 5-celled von Neumann neighborhood.at n=26A273079