38157

Appears in sequences

• Number of unrooted quartic trees with n (unlabeled) nodes and possessing a centroid; number of n-carbon alkanes C(n)H(2n +2) with a centroid ignoring stereoisomers.at n=17A010372
• Numbers n such that mu(n) + mu(n+1) + mu(n+2) + mu(n+3) + mu(n+4) + mu(n+5) + mu(n+6) = 6.at n=23A082967
• Least k > 1 such that k^n is a twin rank (cf. A002822: 6*k^n +- 1 are twin primes).at n=26A326230
• a(n) is the least nonnegative integer k such that (k^2 + prime(n)^2)/2 is prime but (k^2 + prime(i)^2)/2 is not prime for i < n.at n=50A358804
• Indices where the cumulative sum of cos(2k+1)^(2k+1) reaches a record high value.at n=9A389559