27134

Appears in sequences

• Third column of A071223.at n=17A087645
• Even numbers k such that if a person is born in year k and lives not more than 100 years, then he never celebrates his prime birthday on a prime year.at n=32A124658
• Numbers whose sum of anti-divisors is equal to the sum of the divisors of their arithmetic derivative.at n=25A249912
• Numbers k such that the largest prime divisor of k^4+1 is less than k.at n=37A309562
• Number of compositions of n where each part after the first is either twice or half the prior part.at n=57A342331
• Expansion of (1/x) * Series_Reversion( x*(1+x+x^2)/(1+x)^3 ).at n=13A366114
• a(n) = floor(x^n) where x^x = e.at n=18A389675