388076

Appears in sequences

• Primitive weird numbers: weird numbers with no proper weird divisors.at n=18A002975
• Numbers k such that sigma(k) == 8 (mod k).at n=14A045770
• The floor(1.001*x)-perfect numbers, where f-perfect numbers for an arithmetical function f are defined in A066218.at n=5A066239
• The floor(n/2)-perfect numbers, where f-perfect numbers for an arithmetical function f are defined in A066218.at n=10A066240
• Numbers k with abundance radius of 8, i.e., abs(sigma(k)-2*k) = 8.at n=20A088820
• Numbers k whose abundance is 8: sigma(k) - 2*k = 8.at n=10A088833
• Admirable numbers whose abundance is < 10.at n=25A109788
• Admirable numbers such that the subtracted divisor is square.at n=26A109806
• Near-multiperfects with primes, powers of 2, 6 * prime and 2^n * prime excluded, abs(sigma(n) mod n) <= log(n).at n=26A117350
• Weird numbers (A006037) not divisible by 5.at n=17A138850
• Primitive weird numbers (pwn) (A002975) whose abundance (A033880) is a power of 2 (A000079).at n=13A258250
• Primitive weird numbers (A002975) of the form 2^k*p*q*x with k >= 0 and odd p, q, x >= 3.at n=8A258401
• Primitive weird numbers (PWN) of the form 2^k*p*q*r with k > 0 and where p < q < r are odd primes.at n=8A258883
• Numbers k such that sigma(k) == 0 (mod k+4).at n=13A274553
• Primitive weird numbers (pwn; A002975) divisible by 4 but not 8.at n=7A322524
• Weird admirable numbers: numbers that are both weird (A006037) and admirable (A111592).at n=14A329190
• a(n) = Sum_{k=0..n} binomial(n, k)*(2^k - binomial(k, floor(k/2))).at n=12A330796
• Weird numbers k such that k+1 is the sum of a subset of the aliquot divisors of k.at n=15A354282