42653

Appears in sequences

• For n>0, a(n) is the least quasi-Carmichael number to base -n, extended to n=0 with the least composite squarefree integer.at n=27A029591
• Gaps of 6 in sequence A038593 (lower terms).at n=8A038651
• Let b(1)=1, b(2)=2, b(n) = sum of digits of b(1)+b(2)+b(3)+...+b(n-1), sequence gives values of n such that b(n)=3.at n=28A084229
• Number of partitions of n that sorted in increasing order contain a part k in position k for some k.at n=41A238395
• Number of length n+5 0..3 arrays with at most two downsteps in every 5 consecutive neighbor pairs.at n=2A255657
• T(n,k)=Number of length n+k 0..3 arrays with at most two downsteps in every k consecutive neighbor pairs.at n=23A255660
• Number of length n+3 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=4A255663
• Least k such that phi(k) has exactly n divisors.at n=38A276044
• Odd squarefree numbers n > 1 such that lambda(n)^2 = phi(n), where lambda is the Carmichael lambda function and phi is Euler's totient function.at n=32A276980