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A161813
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Rank of n in the lunar poset.
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7
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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;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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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]
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EXAMPLE
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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
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CROSSREFS
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Cf. A161813, A144171, A144175, A171786, A171787, A171788, A171789, A171794, A171795, A171796, A191752, A191753.
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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