A088404 a(n) = A069537(n)/2.

1, 10, 55, 100, 505, 550, 1000, 5005, 5050, 5500, 10000, 50005, 50050, 50500, 55000, 100000, 500005, 500050, 500500, 505000, 550000, 1000000, 5000005, 5000050, 5000500, 5005000, 5050000, 5500000, 10000000, 50000005, 50000050, 50000500

Offset: 1

Author

Ray Chandler, Sep 29 2003

Keywords

• nonn
• easy

Comments

Sequence comprises all integers that are the arithmetic mean of two powers of ten, A011557. - Lewis Chen, Jul 17 2025

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A069537.