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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
OFFSET
0,3
LINKS
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]
CROSSREFS
Sequence in context: A266642 A245450 A115307 * A086185 A072564 A223938
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Oct 02 2010
STATUS
approved