45671

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 27 ones.at n=26A031795
• Maximum cycle size in range [A014137(n-1)..A014138(n-1)] of permutation A071655/A071656.at n=11A089414
• a(n) = smallest M such that M is not divisible by prime(1), ..., prime(n), but is divisible by Sum_{i=1..n} (M mod prime(i)); or 0 if no such M exists.at n=23A106572
• a(n) is the smallest number not yet in the sequence such that the concatenation of all terms yields a periodic stream of digits 1, 2, 3, ..., 7 (repeat from 1).at n=30A165305
• Composite numbers whose sum of aliquot parts divides the sum of their unrelated numbers.at n=12A250399
• Numbers n such that sum of the proper divisors of n is the square of the sum of the digits of n.at n=12A279459
• a(n) is the sum of quadratic nonresidues of A002145(n) (the n-th prime == 3 mod 4).at n=40A282036
• Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic nonresidues mod p .at n=20A282726
• Lexicographically first sequence of distinct terms such that any set of seven successive digits can be reordered as {d, d+1, d+2, d+3, d+4, d+5, d+6}, d being the smallest of the seven digits.at n=42A302502
• a(n) = Sum_{k=1..n} (-1)^(k+1) * floor((n/k)^3).at n=36A350222