238639

Properties

Appears in sequences

• Primes p of the form p=n^2+3n+9 such that q=p^2+3p+9 is also prime.at n=9A175284
• First of quadruples of consecutive happy numbers.at n=28A194352
• Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=3A254416
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=13A254422
• Number of (4+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=1A254425
• Prime numbersat n=21111