42439

Appears in sequences

• Numbers that are the sum of 9 positive 9th powers.at n=25A003398
• Powers of sqrt(21) rounded down.at n=7A017967
• Powers of sqrt(21) rounded to nearest integer.at n=7A017968
• Powers of fourth root of 21 rounded down.at n=14A018105
• Powers of fourth root of 21 rounded to nearest integer.at n=14A018106
• Products p^3 or p^2*q, where {p,q} are consecutive primes.at n=32A033477
• Nearest integer to n^(7/2).at n=21A036489
• Numerators of continued fraction convergents to sqrt(859).at n=8A042658
• Numbers n such that the sum of composites from the smallest prime factor of n to the largest prime factor of n is equal to the sum of squarefree numbers from the smallest prime factor of n to the largest prime factor of n.at n=6A074255
• a(n) = floor(sqrt(n^7)).at n=21A155014
• Maximal non-semiprime number which is a "preprime" of the n-th kind (defined in comment in A247395).at n=35A247834
• G.f.: Sum_{n=-oo..+oo} x^n * (1 - x^n)^(3*n).at n=55A268298
• Upper bound for the determinant of an n X n matrix whose entries are a permutation of the multiset {1^n,...,n^n}.at n=6A328031