57326

Appears in sequences

• a(1)=2. For n >=2, a(n) = the least integer >= a(n-1) that is not coprime to both a(n-1)+1 and a(n-1).at n=34A140525
• a(n) = 49*n^2 - 78*n + 31.at n=34A157368
• The sum of the first n terms of the sequence is the concatenation of the first n bits of the sequence read as binary, with a(1) = 1.at n=16A308092
• Number of permutations sigma of [n] such that sigma(k)/k > sigma(k+1)/(k+1) for 1 <= k <= n-1.at n=19A309807
• Number of integer partitions of n whose product is a proper multiple of n.at n=49A380219