5000150001
domain: N
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=22A038494
- Triangular numbers containing 2n digits obtained by duplicating the first n digits; i.e., triangular numbers in A020338.at n=18A068899
- Triangular numbers composed of digits {0,1,5}.at n=26A119039