61047

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 13.at n=20A031691
• Sum(j=1,n,floor(A000041(j)/j)).at n=54A086736
• Concatenation of n-th Fibonacci number and n-th prime.at n=14A138821
• a(n) = 169*n^2 + 2*n.at n=18A158220
• a(n) = 3*binomial(n+1, 5).at n=19A253942
• Natural number that is a factor of its number of "feasible" partition(s).at n=11A254437
• Number of integer-sided hexagons having perimeter n, modulo rotations but not reflections.at n=32A293823
• Partition the integers from 1 to n into three groups with consecutive numbers, then a(n) is the maximum value of the sum of the numbers in the second group multiplied by the minimum of the sum of the numbers in the first and third groups.at n=34A342713
• a(0) = ... = a(4) = 1; a(n) = Sum_{k=1..n-5} a(k) * a(n-k-5).at n=37A346049