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Search: id:A126519
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| A126519 |
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Number of base 24 n-digit numbers with adjacent digits differing by four or less. |
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+0
2
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| 1, 24, 196, 1644, 13916, 118416, 1010892, 8648028, 74086762, 635291688, 5451042614, 46791744232, 401773647392, 3450448765596, 29636332554924, 254571572184234, 2186853928177032, 18786503501683672, 161392382824498244
(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)+9^(n-1) for base>=4n-3; a(base,n)=a(base-1,n)+9^(n-1)-2 when base=4n-4
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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]`-$[i+1]`>4)+($[i+1]`-$[i]`>4))
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CROSSREFS
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Cf. Base 24 differing by three or less A126492, two or less A126411, one or less A126378.
Adjacent sequences: A126516 A126517 A126518 this_sequence A126520 A126521 A126522
Sequence in context: A042114 A123197 A125361 this_sequence A048355 A132458 A055857
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhh(AT)cadence.com), Dec 28 2006
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