35742

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 18.at n=21A031696
• a(n) = 441*n^2 + 21.at n=9A158603
• Number of vertices with even distance from the root in "0-1-2" Motzkin trees on n edges.at n=11A179176
• G.f.: exp( Sum_{n>=1} 2^A090740(n) * x^n/n ) where A090740(n) = highest exponent of 2 in 3^n-1.at n=28A182000
• Numbers n such that (6k-1) for k=n, n+1, n+2, n+3 are all primes with no primes of the form (6k+1) in between.at n=31A296011
• Products of 5 distinct primes that are sandwiched between squarefree semiprime numbers.at n=36A376949