101030

Appears in sequences

• Numbers whose base-10 representation has exactly 6 runs.at n=18A043642
• Numbers <= 10^6 with valid Luhn mod 10 check digit, sorted first by check digit, then lexicographically.at n=12A249855
• The number of unitary untouchable numbers <= 10^n.at n=6A290240
• Number of finite regions in a complete bipartite graph where the n vertices of each part are placed on the vertices, and on opposite sides, of a regular 2n-gon.at n=25A392972