28972

Appears in sequences

• Absolute value of Glaisher's alpha(n).at n=32A002290
• McKay-Thompson series of class 34a for the Monster group.at n=45A058639
• a(n) is the smallest number that cannot be obtained from the numbers {1,3,...,2*n-1} using each number at most once and the operators +, -, *, /, where intermediate subexpressions must be integers.at n=7A071313
• Sum of the even parts in the partitions of n into 6 parts.at n=38A309552
• a(1) = 1; a(2) = 1; for n >= 3, a(n) = a(n-1) / gcd(a(n-1), n-1) + a(n-2) / gcd(a(n-2), n-2).at n=40A330806
• Convolution of A007528 and A002476.at n=13A354543