222841

Properties

Appears in sequences

• Primes that remain prime through 5 iterations of function f(x) = 2x + 9.at n=17A023334
• Position reached by frog in A038027 or 0 if none. A038026(A038027(n)).at n=17A038028
• Fibonacci + Goldbach (dual sequence to A216275). a(1)=5, a(2)=7 and for n>=3, a(n) = g(a(n-1) + a(n-2)), where for m>=3, g(2*m) is the maximal prime p < 2*m such that 2*m - p is prime.at n=25A216835
• Number of 7Xn 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=7A224163
• Prime numbersat n=19843