A247902 First differences of A247683.

90, 18, 36, 18, 18, 54, 36, 90, 18, 72, 18, 18, 18, 36, 18, 54, 18, 90, 18, 18, 18, 18, 18, 36, 18, 36, 18, 18, 18, 36, 90, 36, 18, 18, 18, 72, 18, 54, 18, 18, 18, 18, 54, 36, 18, 18, 18, 18, 18, 54, 36, 36, 18, 36, 36, 18, 18, 54, 18, 54, 36, 18, 18, 18, 18, 18, 54, 18, 18, 72, 18, 54, 36, 36, 18, 36, 36, 18, 18, 18, 18

Offset: 1

Author

Odimar Fabeny, Sep 26 2014

Keywords

• nonn
• easy

Comments

All terms have digital root equal to 9.

Links

• Odimar Fabeny, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A247683.