1380825

Appears in sequences

• Alkane (or paraffin) numbers l(9,n).at n=32A018210
• Odd numbers of the form p^(1+4k) * r^2, where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1 that are closer to being perfect than previous terms.at n=5A228059
• Number of n-element subsets of [n+6] having an even sum.at n=32A282082
• Least odd primitive abundant number having its prime signature.at n=33A316116
• Odd numbers k such that 2*k is equal to bitwise-AND of 2*k and sigma(k).at n=2A324647
• Odd nonsquares k for which A161942(k) >= k, where A161942 is the odd part of sigma.at n=37A348743
• Odd nondeficient numbers of the form p^(1+4k) * r^2, where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1.at n=37A386427
• Primitive nondeficient numbers (A006039) that satisfy Euler's criteria for odd perfect numbers (A228058).at n=2A387709