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Search: id:A126549
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| A126549 |
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Number of base 28 n-digit numbers with adjacent digits differing by five or less. |
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+0
1
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| 1, 28, 278, 2838, 29248, 303050, 3150192, 32813808, 342256684, 3572874122, 37318284692, 389922817124, 4075058667258, 42594362751624, 445257076027562, 4654740529039096, 48662762737708064, 508755029491780946
(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)+11^(n-1) for base>=5n-4; a(base,n)=a(base-1,n)+11^(n-1)-2 when base=5n-5
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PROGRAM
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(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>5)+($[i+1]`-$[i]`>5))
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CROSSREFS
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Cf. Base 28 differing by four or less A126523, three or less A126496, two or less A126415, one or less A126382.
Sequence in context: A065693 A159883 A125391 this_sequence A107418 A027781 A126662
Adjacent sequences: A126546 A126547 A126548 this_sequence A126550 A126551 A126552
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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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