27583

Properties

Appears in sequences

• Triangle T(n,k), 0<=k<=n, giving coefficients when output sequence O_0, O_1, O_2, ... from transformation described in A059216 is expressed in terms of input sequence I_0, I_1, I_2, ...at n=52A059718
• Lesser of two consecutive primes such that n*p + q is a perfect square, p < q.at n=25A064545
• Let f(n) be the smallest prime == 1 mod n (cf. A034694). Sequence gives triangle T(j,k) = f^k(j) for 1 <= k <= j, read by rows.at n=40A083809
• 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=25A091368
• Primes p such that q-p = 28, where q is the next prime after p.at n=23A124595
• a(n) = floor((1 + 1/Pi)^n).at n=36A179492
• Number of nX3 0..4 arrays with each element equal to the number its horizontal and vertical neighbors less than itself.at n=3A196425
• Number of nX4 0..4 arrays with each element equal to the number its horizontal and vertical neighbors less than itself.at n=2A196426
• T(n,k) = Number of n X k 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than itself.at n=17A196430
• T(n,k) = Number of n X k 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than itself.at n=18A196430
• Primes p of the form m^2 + 27.at n=23A227622
• Primes of the form 6*p + 1 with p prime that are also of the form x^2 + 27*y^2 and congruent to 7 mod 24.at n=31A256172
• Decimal representation of the middle column of the "Rule 167" elementary cellular automaton starting with a single ON (black) cell.at n=14A267581
• Primes 10k + 3 at the end of the maximal gaps in A269234.at n=11A269236
• Primes p such that 2*p + 59 is a square.at n=31A269789
• p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = 1 - S - S^4.at n=18A291738
• Yarborough primes that remain Yarborough primes when each of their digits are replaced by their squares.at n=40A296187
• Primes whose binary complement (A035327) is a square.at n=39A323067
• Prime numbersat n=3012