501501

Appears in sequences

• Images of hexamorphic numbers: suppose k-th hexagonal number H(k) (A000384) ends in k; sequence gives positive values of H(k).at n=12A038494
• Triangular numbers containing 2n digits obtained by duplicating the first n digits; i.e., triangular numbers in A020338.at n=8A068899
• Triangular numbers composed of digits {0,1,5}.at n=11A119039
• Least triangular number t such that t = prime(n)*triangular(m) for some m>0, or 0 if no such t exists.at n=38A225503
• Number of unordered pairs of distinct integer partitions of n.at n=22A355389