40730

Appears in sequences

• Numbers n such that sigma(n)=2n-phi(phi(n)).at n=24A110073
• Number of partitions of n into parts that are odd or == +- 2 (mod 10).at n=51A133153
• Number of Dyck paths of semilength n such that the minimal number of peaks over all positive levels equals seven.at n=12A288546
• Numbers whose deficiency is a perfect number.at n=23A302125
• Expansion of Product_{i>=1, j>=0} (1 + x^(i*2^j)) / (1 - x^(i*2^j)).at n=18A327727
• Starts of runs of 3 consecutive tribonacci-Niven numbers (A352089).at n=22A352091