70564

Appears in sequences

• Expansion of (1-x)/(1-x-2*x^2-2*x^3).at n=15A078006
• Numbers k with abundance radius of 8, i.e., abs(sigma(k)-2*k) = 8.at n=13A088820
• Near-multiperfects with primes and powers of 2 excluded, abs(sigma(m) mod m) <= log(m).at n=37A117348
• Near-multiperfects with primes, powers of 2 and 6 * prime excluded, abs(sigma(n) mod n) <= log(n).at n=37A117349
• Near-multiperfects with primes, powers of 2, 6 * prime and 2^n * prime excluded, abs(sigma(n) mod n) <= log(n).at n=18A117350
• Numbers k whose abundance sigma(k) - 2*k = -8. Numbers k whose deficiency is 8.at n=7A125247
• Ceiling(n/2)-perfect numbers.at n=22A177050
• Expansion of e.g.f. exp(x) / (4 - 3*exp(x)).at n=5A201354
• Numbers k such that sigma(k) == 0 (mod k-4).at n=13A274554
• Numbers n for which A294898(n) is not zero and A294898(n) divides A000120(n); numbers for which A326130(n) = abs(A294898(n)).at n=25A326132
• Deficient numbers k > 1 such that k*p is abundant for all primes p dividing k.at n=9A341358
• Square array A(n, k) = n! * [t^n] (exp(t)/(1+k-k*exp(t))) for n >= 0 and k >= 0, read by antidiagonals upwards.at n=39A369435