20741
domain: N
Appears in sequences
- Sums of 5 distinct powers of 4.at n=40A038473
- Base-8 palindromes that start with 5.at n=22A043025
- Cubic star numbers: a(n) = n^3 + 4*Sum_{i=0..n-1} i^2.at n=21A051673
- Number of naturally embedded binary trees with n nodes that have no label greater than 0.at n=12A101488
- Index k of the least colossally abundant number c=A004490(k) with sigma(c)/c >= n.at n=20A110443
- a(n) = p^2 - sum of digits of p^p, where p = prime(n).at n=34A140499
- Positive integers of the form (6*m^2 + 1)/11.at n=35A179337
- Total sum of parts greater than 1 in all the partitions of n except one copy of the smallest part greater than 1 of every partition.at n=22A196025
- a(n) is the total number of pentagrams in a variant of pentagram fractal after n iterations.at n=14A263418
- Number of compositions (ordered partitions) of n into quarter-squares (A002620).at n=18A282583
- a(n) = number of edges in a cocoon concertina n-cube.at n=5A300694
- Values of w(k) when w(k-2), w(k-1), and w(k) are all odd, where w is A336957.at n=5A338071
- Semiprimes of the form k^2 + 5.at n=42A361696