33391

Properties

Appears in sequences

• Cuban primes: primes which are the difference of two consecutive cubes.at n=42A002407
• Third term of strong prime sextets: p(m-1)-p(m-2) > p(m)-p(m-1) > p(m+1)-p(m) > p(m+2)-p(m+1) > p(m+3)-p(m+2).at n=9A054815
• Number of base 11 n-digit numbers with adjacent digits differing by four or less.at n=5A126506
• Primes containing the string 333.at n=27A166581
• Number of strings of numbers x(i=1..n) in 0..4 with sum i^2*x(i)^2 equal to n^2*16.at n=11A184235
• Numbers n such that n!10 + 2 is prime.at n=54A204657
• Triangle read by rows: T(n,k) is the number of ascent sequences of length n with last occurrence of the maximal value at position k-1.at n=52A218581
• The Wiener index of the straight pentachain of n pentagonal rings (see Fig. 2.1 in the A. A. Ali et al. reference).at n=24A224459
• The sum of the areas of the bargraphs of semiperimeter n (n>=2).at n=8A273347
• Number of partitions of n*(n-1)/2 into at most three parts.at n=35A274233
• Primes of the form (1 + x)^y + (-x)^y where y is a divisor of x.at n=39A285887
• a(n) = n if n is 1 or prime; otherwise (1) let m = (concatenation of the two divisors in the middle of rows of A027750(n)), (2) if m is prime then a(n) = m, otherwise return to (1) with n=m.at n=49A329181
• Number of quantales on n elements, up to isomorphism.at n=5A354493
• Left-truncatable happy numbers: every suffix is a happy number and no digits are zero.at n=23A383639
• Prime numbersat n=3576