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A171610
a(n) = 0+1+2+...+n in lunar arithmetic in base 7 written in base 7.
0
0, 1, 2, 3, 4, 5, 6, 16, 16, 16, 16, 16, 16, 16, 26, 26, 26, 26, 26, 26, 26, 36, 36, 36, 36, 36, 36, 36, 46, 46, 46, 46, 46, 46, 46, 56, 56, 56, 56, 56, 56, 56, 66, 66, 66, 66, 66, 66, 66, 166, 166, 166, 166, 166, 166, 166, 166, 166, 166, 166, 166, 166, 166, 166, 166, 166
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: A138987 A318534 A265405 * A004835 A037341 A228730
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Oct 02 2010
STATUS
approved