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A171464 a(n) = 0+1+2+...+n in lunar arithmetic in base 4 written in base 10. 0
0, 1, 2, 3, 7, 7, 7, 7, 11, 11, 11, 11, 15, 15, 15, 15, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 127, 127, 127, 127, 127, 127 (list; graph; refs; listen; history; text; internal format)
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: A104955 A011161 A305420 * A276730 A179894 A060215
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Oct 02 2010
STATUS
approved

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Last modified November 29 03:03 EST 2023. Contains 367422 sequences. (Running on oeis4.)