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Search: id:A126547
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| A126547 |
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Number of base 26 n-digit numbers with adjacent digits differing by five or less. |
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+0
1
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| 1, 26, 256, 2596, 26586, 273768, 2828090, 29270910, 303304140, 3144995160, 32624286682, 338508404178, 3512870407964, 36458032099558, 378396656960160, 3927490056266692, 40765343764050602, 423128260660074728
(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 26 differing by four or less A126521, three or less A126494, two or less A126413, one or less A126380.
Sequence in context: A086023 A125389 A109467 this_sequence A136922 A136921 A042308
Adjacent sequences: A126544 A126545 A126546 this_sequence A126548 A126549 A126550
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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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