28573

Properties

Appears in sequences

• Expansion of 1/(1-x^4-x^5-x^6-x^7-x^8-x^9-x^10-x^11).at n=39A017833
• Numbers k such that 255*2^k-1 is prime.at n=43A050886
• Primes p from A031924 such that A052180(primepi(p)) = 17.at n=29A052234
• Prime number spiral (clockwise, East spoke).at n=28A054555
• Primes of the form sum 6d/(2 + mu(d)) for some k and all d dividing k.at n=37A069548
• Primes p such that the sum of the digits of p is not prime, but the sum of each digit raised to the 4th power is prime.at n=28A091368
• Values of n for which the decimal number 10...080...01 is an n-digit prime.at n=10A100458
• Primes p such that 2*p +/- 3 and 8*p +/- 3 are all primes.at n=15A106022
• a(0)=1, a(1)=1, a(n) = 13*a(n/2) for n=2,4,6,..., a(n) = 12*a((n-1)/2) + a((n+1)/2) for n=3,5,7,....at n=17A116524
• Primes of the form k^2 + 12.at n=25A138368
• Numbers that can be formed using its own digits in order and only addition and fourth power operators.at n=25A195672
• Primes of the form 6n^2 + 7.at n=28A201601
• a(n) = 111*n^2 - 3123*n + 10753.at n=33A211607
• Smallest of five consecutive primes in arithmetic progression with common difference 90 and equal digit sums.at n=21A253232
• Number of n X 1 0..3 arrays with every repeated value in every row and column one larger mod 4 than the previous repeated value, and upper left element zero.at n=8A268164
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 525", based on the 5-celled von Neumann neighborhood.at n=30A272740
• a(n) = Sum_{k=1..n} gcd(k, n)^4.at n=12A343498
• Primes p such that p^2 is the concatenation of x and 2*x+1 for some x.at n=3A355970
• Starts of runs of at least 3 consecutive odd numbers whose prime factors are all prime-indexed primes.at n=24A357168
• a(n) is the first prime p such that the concatenations of n consecutive primes, starting with p, in both forward and backward directions, are prime.at n=35A384958