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Search: id:A126540
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| A126540 |
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Number of base 19 n-digit numbers with adjacent digits differing by five or less. |
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+0
1
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| 1, 19, 179, 1749, 17269, 171283, 1701677, 16916769, 168213851, 1672806301, 16635830987, 165443231083, 1645339968293, 16363006476491, 162731213670657, 1618373433642625, 16094839928704707, 160064344144932989
(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 19 differing by four or less A126514, three or less A126487, two or less A126406, one or less A126373.
Sequence in context: A041690 A133740 A125382 this_sequence A008419 A034273 A139619
Adjacent sequences: A126537 A126538 A126539 this_sequence A126541 A126542 A126543
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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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