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Search: id:A124894
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| A124894 |
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Number of base 16 circular n-digit numbers with adjacent digits differing by 2 or less. |
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+0
1
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| 1, 16, 74, 274, 1182, 5146, 22988, 104008, 475702, 2193322, 10178844, 47489128, 222537384, 1046705104, 4938809502, 23367231454, 110821701894, 526680449962, 2507653172738, 11959006821214, 57115337351332, 273132653565388
(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)+A005191(n+1) for base>=2.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]`-$[(i+1)mod N]`>2)+($[(i+1)mod N]`-$[i]`>2))
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CROSSREFS
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Sequence in context: A056633 A098096 A058333 this_sequence A126403 A103111 A118862
Adjacent sequences: A124891 A124892 A124893 this_sequence A124895 A124896 A124897
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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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