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Search: id:A124704
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| A124704 |
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Number of base 11 circular n-digit numbers with adjacent digits differing by 1 or less. |
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+0
1
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| 1, 11, 31, 71, 187, 491, 1327, 3623, 10003, 27827, 77911, 219263, 619747, 1758131, 5003239, 14276831, 40836163, 117049091, 336123463, 966831503, 2785160227, 8034032147, 23203096519, 67087148063, 194165268355, 562477731491
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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[Empirical] a(base,n)=a(base-1,n)+A002426(n+1) for base>=1.int(n/2)+1
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PROGRAM
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(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>1)+($[(i+1)mod N]`-$[i]`>1))
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CROSSREFS
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Sequence in context: A040973 A141884 A139634 this_sequence A089346 A038773 A054757
Adjacent sequences: A124701 A124702 A124703 this_sequence A124705 A124706 A124707
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
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