1572867

Appears in sequences

• New record highs reached in A060000.at n=22A060013
• a(n) is the number whose binary representation is A138144(n).at n=20A147595
• Number of subsets of {1..n} whose elements have the same number of distinct prime factors.at n=42A339512
• a(0)=4; if n > 0 is even then a(n) = 2^(n/2+1)+3, otherwise a(n) = 3*(2^((n-1)/2)+1).at n=39A343177