52940

Appears in sequences

• a(n) = A068875(n-1) - A003239(n).at n=13A106520
• Numbers k for which the sum of digits of sigma(k) = the product of digits of sigma(k).at n=24A277217
• 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=23A374274