43808

Appears in sequences

• Number of lines through exactly 2 points of an n X n grid of points.at n=22A018809
• Sum of largest parts (counted with multiplicity) in all compositions of n.at n=13A097976
• Product of the 5th power of a prime and different distinct prime of the 2nd power (p^5*q^2).at n=17A179646
• Expansion of x * f(-x^7) * f(-x^21) / (f(-x) * f(-x^3)) where f() is a Ramanujan theta function.at n=35A226007
• a(n) = 32*n^2.at n=37A244082
• Primitive numbers whose abundance is positive and odd.at n=14A259231
• Number of (n+2)X(1+2) arrays of permutations of 0..n*3+5 with each element moved 0 or 1 knight moves and no more than 3 elements left unmoved.at n=4A263543
• T(n,k)=Number of (n+2)X(k+2) arrays of permutations of 0..(n+2)*(k+2)-1 with each element moved 0 or 1 knight moves and no more than 3 elements left unmoved.at n=10A263545
• T(n,k)=Number of (n+2)X(k+2) arrays of permutations of 0..(n+2)*(k+2)-1 with each element moved 0 or 1 knight moves and no more than 3 elements left unmoved.at n=14A263545
• Numbers whose sum of squarefree divisors and sum of nonsquarefree divisors are both squarefree numbers.at n=16A300984
• Numbers k for which sqrt(k/2) divides k and the symmetric representation of sigma(k) consists of a single part and its width at the diagonal equals 1.at n=35A365265
• Numbers that have exactly one Zumkeller divisor but are not Zumkeller.at n=12A376877
• a(n) is the least m > 0 such that sigma(m) - 2m = A140863(n).at n=50A380866