18043

Properties

Appears in sequences

• Beginning of last prime pattern of length n to appear among positive integers.at n=18A035326
• Beginning of last prime pattern of length n to appear among positive integers.at n=19A035326
• Suppose p and q = p+18 are primes. Define the difference pattern of (p,q) to be the successive differences of the primes in the range p to q. There are 49 possible difference patterns, shown in the Comments line. Sequence gives smallest value of p for each difference pattern, sorted by magnitude.at n=48A079019
• Number of distinct lines through the origin in 3-dimensional cube of side length n.at n=27A090025
• Prime quadruples: 2nd term.at n=16A136720
• Primes congruent to 23 mod 53.at n=36A142553
• Primes congruent to 48 mod 61.at n=33A142846
• Number of permutations of 1..n containing the relative rank sequence { 213465 } at any spacing.at n=3A159139
• (11*9^n+1)/4.at n=4A199679
• Primes of the form 2n^2 - 7.at n=28A201714
• Number of permutations T(n,k) in S_n containing an increasing subsequence of length k; triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=41A214152
• Number of permutations in S_{n+3} containing an increasing subsequence of length n.at n=6A217193
• Primes of the form 2*n^2 + 90*n + 43.at n=6A217621
• Minimum value unattainable as the sum of 2 attained values of a*b*c with a,b,c 0..n integers.at n=25A225264
• Volume of right circular cone (rounded down) with the diameter of base and height equal to n.at n=40A228189
• Primes q with A253683(n) > q > A253685(n) such that (A253683(n), q, A253685(n)) forms a Wieferich triple.at n=6A253684
• Non-palindromic balanced primes.at n=34A256076
• a(0)=0, a(1)=1, a(n) = min{3 a(k) + (3^(n-k)-1)/2, k=0..(n-1)} for n>=2.at n=33A259653
• Lucky primes k such that k+6 is also a lucky prime.at n=29A309381
• Wieferich sequence where a(1) = 2.at n=4A359952