A186508 Number of lunar divisors (A087029) of the decimal numbers 1, 10, 11, 100, 101, 110, 111, 1000, ... .

9, 19, 90, 27, 90, 180, 819, 36, 90, 180, 738, 270, 738, 1638, 7641, 45, 90, 180, 738, 270, 819, 1476, 6570, 360, 738, 1476, 6732, 2457, 6570, 14922, 67968

Offset

1,1

Comments

This is for lunar arithmetic in base 10.

Links

Table of n, a(n) for n=1..31.

D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]

Index entries for sequences related to dismal (or lunar) arithmetic

Example

The lunar divisors of 1 are 1,2,3,4,5,6,7,8,9, so a(1)=9.
The lunar divisors of 10 are 1...9 and 10, 20, 30, 40, ..., 90, so a(2) = 18.

Crossrefs

Cf. A087029, A186443, A186510.

Sequence in context: A146080 A334640 A259093 * A000981 A060227 A171066

Adjacent sequences: A186505 A186506 A186507 * A186509 A186510 A186511

Keyword

base,nonn,more

Author

N. J. A. Sloane, Feb 22 2011

Status

approved