18451

Properties

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 96 ones.at n=8A031864
• a(1) = 2; a(n) is the smallest prime > a(n-1) such that a(n) + a(n-1) is a square.at n=19A062064
• Largest prime divisor of Lucas(5*n), where Lucas(k) = A000032(k).at n=14A121171
• Self-convolution square-root of column 1 (A127128) of triangle A127126.at n=6A127131
• Primes congruent to 43 mod 59.at n=39A142770
• Primes p such that p^3-p-+1 are twin primes.at n=27A158295
• a(n) = (4*n^3 - 12*n^2 + 14*n + 3)/3.at n=25A161703
• Prime numbers 3*n-2 such that n, 2*n-1 and 3*n-2 are prime.at n=28A180025
• Lucas Aurifeuillian primitive part B of Lucas(10*n - 5).at n=7A190781
• Last occurrence of n partitions in A204814.at n=30A205301
• Smallest prime Q such that prime(n)*(2*Q)^prime(n)+1 is prime.at n=38A245601
• Number of nX3 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.at n=5A297918
• Number of nX6 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.at n=2A297921
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.at n=30A297923
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.at n=33A297923
• Number of parts in all partitions of n in which no part occurs more than ten times.at n=25A320613
• Number of compositions of n into parts with distinct multiplicities and with exactly nine parts.at n=18A321779
• Primes p such that (p+2)/3 and (p+3)/2 are prime.at n=36A338410
• Number of partitions of n into 9 or more parts.at n=29A347545
• Discriminants of imaginary quadratic fields with class number 35 (negated).at n=27A351673