179999

Properties

Appears in sequences

• Primes that remain prime through 5 iterations of function f(x) = 9x + 10.at n=8A023355
• Numerators of continued fraction convergents to sqrt(605).at n=8A042160
• Let (p1,p2), (p3,p4) be pairs of twin primes with p1*p2=p3+p4-1; sequence gives values of p3.at n=4A047978
• Smaller member of a twin prime pair with a square sum.at n=17A069496
• a(n) = smallest k such that 5k has a digit sum = n.at n=48A077492
• Primes p such that 5 is the largest of all prime factors of the numbers between p and the next prime (cf. A052248).at n=20A080185
• Primes equal to a product of twin primes minus 1 divided by 2.at n=9A086870
• Primes with digit sum = 44.at n=2A106776
• (Product of twin primes - 1)/2.at n=26A120876
• Primes in A128490.at n=37A128491
• Numbers in A137365 but not in A137366.at n=20A138556
• The lesser of twin prime pairs with each prime in a different millennia.at n=4A158861
• Primes that end in 999.at n=35A230202
• Twin prime pairs which sum to perfect squares.at n=34A232878
• Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, vertically, diagonally or antidiagonally, and top left element zero.at n=3A233019
• Number of nX4 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, vertically, diagonally or antidiagonally, and top left element zero.at n=3A233022
• T(n,k)=Number of nXk 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, vertically, diagonally or antidiagonally, and top left element zero.at n=24A233026
• Smaller member of a twin prime pair with a perfect power sum.at n=20A270231
• Square array read by antidiagonals upwards: M(n,k) is the initial occurrence of first prime p1 of consecutive primes p1, p2, where p2 - p1 = 2*k, and p1, p2 span a multiple of 10^n, n>=1, k>=1.at n=6A287050
• Expansion of x*(1 + 2*x*(5 - 4*x)*(1 + x^2)*(1 + x^4))/((1 - x)*(1 - 10*x^9)).at n=44A302556