42221

Properties

Appears in sequences

• First term of weak prime sextet: p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2) < p(m+4)-p(m+3) < p(m+5)-p(m+4).at n=14A054828
• Primes with either no internal digits or all internal digits are 2.at n=53A069677
• Primes of the form n^2+5*n+c (n>=0), where c=3 for even n and c=-3 for odd n.at n=37A117012
• Least early bird number of order n.at n=10A133652
• Triangle T(n, k, m) = coefficients of p(x, n, m) where p(x,n,m) = (x+1)*p(x, n-1, m) + 2^(m+n-1) *x*p(x, n-2, m) and m=2, read by rows.at n=30A154979
• Triangle T(n, k, m) = coefficients of p(x, n, m) where p(x,n,m) = (x+1)*p(x, n-1, m) + 2^(m+n-1) *x*p(x, n-2, m) and m=2, read by rows.at n=33A154979
• Prime numbers containing the string 222.at n=11A166580
• Primes that are the sum of 51 consecutive primes.at n=32A215992
• Primes having only {1, 2, 4} as digits.at n=32A260267
• Numbers k such that k!6 - 18 is prime, where k!6 is the sextuple factorial number (A085158).at n=35A289696
• Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=10A302423
• Prime numbersat n=4414