31063

Properties

Appears in sequences

• Numbers k such that the smoothly undulating palindromic number(18*10^k - 81)/99 is a prime.at n=9A062214
• Home primes whose homeliness is 4.at n=33A133962
• Triangle c(n,k) of the numerators of coefficients [x^k] P(n,x) of the polynomials P(n,x) of A129891.at n=59A140749
• Primes of the form (2+n)*(1+2*n)+(1+n)*(2+2*n).at n=25A171748
• Cyclops emirps.at n=34A183057
• Number of nondecreasing arrangements of 8 numbers x(i) in -(n+6)..(n+6) with the sum of sign(x(i))*2^|x(i)| zero.at n=12A187992
• Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1.at n=8A255094
• T(n,k) = Number of (n+2) X (k+2) 0..1 arrays with no 3 X 3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 1 and no column sum 1.at n=36A255101
• P(n,k) is an array read by rows, with n > 0 and k=1..5, where row n gives the chain of 5 consecutive primes {p(i), p(i+1), p(i+2), p(i+3), p(i+4)} having the symmetrical property p(i) + p(i+4) = p(i+1) + p(i+3) = 2*p(i+2) for some index i.at n=23A267028
• Iterative procedure in A316941 applied to the odd composite numbers (A071904) (a(n) = -1 if no prime is ever reached).at n=25A276662
• The number of unit squares enclosed by the rectangular spiral of which the n-th side has length prime(n).at n=42A356465
• Primes in A239237.at n=23A361252
• Number of transfer systems for the Dihedral group of order 2p^n, with p an odd prime.at n=5A380296
• Square array read by antidiagonals upwards: T(n,k) (for n>1 and k>0) is the smallest k-digit prime p such that prevprime(p) appears as a substring in p^n; or -1 if no such prime exists.at n=25A383613
• Prime numbersat n=3346