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A171597 a(n) = 0+1+2+...+n in lunar arithmetic in base 7 written in base 10. 0
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 (list; graph; refs; listen; history; text; internal format)
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 A223938 A222194

Adjacent sequences:  A171594 A171595 A171596 * A171598 A171599 A171600

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Oct 02 2010

STATUS

approved

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Last modified July 14 10:07 EDT 2020. Contains 335721 sequences. (Running on oeis4.)