50850

Appears in sequences

• Numbers whose set of base 15 digits is {0,1}.at n=20A033051
• Numbers which can be written as b^2*c^2*(b^2+c^2).at n=34A063663
• Numbers k such that core(k) = ceiling(sqrt(k)) where core(k) is the squarefree part of k (the smallest integer such that k*core(k) is a square).at n=14A069187
• a(n) = n^2*(n^2+1).at n=15A071253
• Numbers k such that k and k^2 use only the digits 0, 2, 5, 7 and 8.at n=27A136916
• Numbers k such that lambda(k) = lambda(k+1).at n=36A173695
• Compositions with superdiagonal growth: number of compositions (p0, p1, p2, ...) of n with pi - p0 >= i.at n=43A238861
• Primitive numbers that are the sum of the squares of two of their distinct divisors.at n=22A338485
• a(n) is the number of large or small squares that are used to tile primitive squares of type 1 whose length of side is A344333(n).at n=27A344334
• a(n) is the number of large or small squares that are used to tile primary squares of type 1 (see A344331) whose side length is A345285(n).at n=35A345286
• a(n) = Sum_{p|n, p prime} n^phi(n/p).at n=14A369782
• Euler transform of A373216.at n=39A373297
• a(n) is the area of the largest rectangle that can be formed from n sticks whose lengths are 1, 2, ..., n.at n=42A381769