1000009

Appears in sequences

• Numbers k such that k^2 contains only digits {0,1,8}, not ending with zero.at n=12A058421
• Suburban numbers: without b, r, s or u.at n=40A072955
• Turban numbers: without letters r, t, or u.at n=11A072956
• Numbers of the form 10^k + 1, 3, 7, or 9 for k>=1.at n=23A088265
• Where records occur in A118514.at n=23A118516
• A (1,1) Somos-4 sequence.at n=17A178081
• a(n) = 10^n + 9.at n=6A253213