30966
domain: N
Appears in sequences
- Numbers k such that the decimal part of k^(1/10) starts with a 'nine digits' anagram.at n=10A034285
- Number of triangular regions in regular n-gon with all diagonals drawn.at n=36A062361
- Number of regions in regular n-gon which are quadrilaterals (4-gons) when all its diagonals are drawn.at n=35A067151
- a(1) = 1; a(n) = a(n-1)*prime(a(n-1)).at n=4A076146
- Where n first appears in A093320.at n=7A094162
- Number of base 12 circular n-digit numbers with adjacent digits differing by 1 or less.at n=9A124705
- Number of partitions of n into parts that are odd or == +- 2 (mod 10).at n=49A133153
- Expansion of Product_{k>=1} 1/(1 + x^k)^sigma(k).at n=47A288421
- Matula-Goebel numbers of transitive rooted identity trees (or transitive finitary sets).at n=21A290760
- Matula-Goebel numbers of unlabeled rooted identity RPMG-trees, meaning the Matula-Goebel numbers of the branches of any non-leaf node are relatively prime.at n=17A316469
- Largest number of maximum matchings in a tree of n vertices.at n=32A333347
- Matula-Goebel tree number of the binomial tree of n vertices.at n=15A358650
- a(n) is the smallest positive integer which can be represented as the sum of distinct nonzero icosahedral numbers in exactly n ways, or -1 if no such integer exists.at n=27A360215