A171597 a(n) = 0+1+2+...+n in lunar arithmetic in base 7 written in base 10.

0, 1, 2, 3, 4, 5, 6, 13, 13, 13, 13, 13, 13, 13, 20, 20, 20, 20, 20, 20, 20, 27, 27, 27, 27, 27, 27, 27, 34, 34, 34, 34, 34, 34, 34, 41, 41, 41, 41, 41, 41, 41, 48, 48, 48, 48, 48, 48, 48, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97, 97

Offset

0,3

Links

Table of n, a(n) for n=0..71.

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

Crossrefs

Sequence in context: A266642 A245450 A115307 * A086185 A072564 A223938

Adjacent sequences: A171594 A171595 A171596 * A171598 A171599 A171600

Keyword

nonn,base

Author

N. J. A. Sloane, Oct 02 2010

Status

approved