44709
domain: N
Appears in sequences
- Numbers k such that sigma(k) = sigma(k+5).at n=17A015865
- Number of integer partitions of 2n whose distinct parts sum to n.at n=32A364910
- a(n) is the smallest number which can be represented as the sum of four distinct nonzero n-gonal numbers in exactly n ways, or -1 if no such number exists.at n=22A374274