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 A161813 Rank of n in the lunar poset. 6
 8, 7, 6, 5, 4, 3, 2, 1, 0, 9, 9, 8, 7, 6, 5, 4, 3, 2, 1, 8, 8, 8, 7, 6, 5, 4, 3, 2, 1, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, 9, 8, 7, 6, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS David Applegate, Table of n, a(n) for n = 1..100000 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] EXAMPLE Ranks of the numbers 1 through 99, written in 10 groups of 10 (the dash is for n=0, where the rank is undefined): - 8 7 6 5 4 3 2 1 0 (1 has rank 8, 2 has rank 7, etc.) 9 9 8 7 6 5 4 3 2 1 (10 has rank 9, 11 has rank 9, etc.) 8 8 8 7 6 5 4 3 2 1 7 7 7 7 6 5 4 3 2 1 6 6 6 6 6 5 4 3 2 1 5 5 5 5 5 5 4 3 2 1 4 4 4 4 4 4 4 3 2 1 3 3 3 3 3 3 3 3 2 1 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 CROSSREFS Cf. A161813, A144171, A144175, A171786, A171787, A171788, A171789, A171794, A171795, A171796, A191752, A191753. Sequence in context: A023450 A141726 A031310 * A284809 A104347 A180598 Adjacent sequences:  A161810 A161811 A161812 * A161814 A161815 A161816 KEYWORD nonn,base AUTHOR David Applegate, Marc LeBrun and N. J. A. Sloane, Aug 20 2010 STATUS approved

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