19655

Appears in sequences

• Schoenheim bound L_1(n,n-5,n-6).at n=21A036837
• Numbers whose base-3 representation contains no 0's and exactly one 1.at n=41A044966
• Denominators of convergents to Pi by Farey fractions.at n=41A063673
• Smallest a(n)>2 such that all integers strictly between a(n)-n and a(n) are composite.at n=45A075741
• a(n) = n^3 - n - 1.at n=26A126420
• Triangle read by rows: T(n,k) = A007318(n-1, k-1) + A001263(n, k) - 1.at n=60A132789
• Numbers k such that 7*(10^(2*k+1)-1)/9 - 3*10^k is prime.at n=12A183179
• Numbers having no 0's and not more than one 1 in their representation in base 3.at n=49A188341
• a(n) = (binomial(n,5) - floor(n/5)) / 5.at n=22A215052
• Greatest number (in decimal representation) with n nonprime substrings in base-3 representation (substrings with leading zeros are considered to be nonprime).at n=23A217113
• Number of composites removed in each step of the Sieve of Eratosthenes for 10^7.at n=18A227155
• Where record values occur in A276781, when starting from A276781(2)=1.at n=46A276782
• a(n) is the smallest integer k > n such that (k+1)(k+2)...(2k-2n+1)/(k(k-1)...(k-n+1)) is an integer.at n=45A290791