33655

Appears in sequences

• Expansion of Product_{k>=1} 1/(1 - x^k)^(sigma_2(k)).at n=11A275585
• Number of palindromic compositions of n into nonprime numbers.at n=50A276421
• Triangle read by rows: T(n,k) is the number of 3-stack-sortable permutations of [n] with k descents (0 <= k <= n-1).at n=39A324916
• Triangle read by rows: T(n,k) is the number of 3-stack-sortable permutations of [n] with k descents (0 <= k <= n-1).at n=41A324916
• Odd numbers m for which A379113(m^2) > 1, i.e., k = m^2 has a proper unitary divisor d > 1 such that A048720(A065621(sigma(d)),sigma(k/d)) is equal to sigma(k).at n=45A379122