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A126398
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Number of base 11 n-digit numbers with adjacent digits differing by two or less.
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3
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1, 11, 49, 225, 1043, 4861, 22723, 106401, 498703, 2338691, 10970731, 51472161, 241518759, 1133320429, 5318237121, 24956866179, 117116084385, 549598276829, 2579143380799, 12103370927679, 56798597444915, 266544122924215
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| [Empirical] a(base,n)=a(base-1,n)+5^(n-1) for base>=2n-1; a(base,n)=a(base-1,n)+5^(n-1)-2 when base=2n-2
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PROG
| (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>2)+($[i+1]`-$[i]`>2))
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CROSSREFS
| Cf. Base 11 differing by one or less A126365.
Sequence in context: A160671 A003063 A124857 * A159486 A185019 A167423
Adjacent sequences: A126395 A126396 A126397 * A126399 A126400 A126401
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KEYWORD
| nonn,base
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Dec 28 2006
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