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 A126538 Number of base 17 n-digit numbers with adjacent digits differing by five or less. 0
 1, 17, 157, 1507, 14607, 142041, 1382455, 13458785, 131037075, 1275829041, 12422061043, 120947162241, 1177600426155, 11465692698745, 111635587544291, 1086938653558289, 10582966126771531, 103040932264504713 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS [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. LINKS FORMULA G.f.: (1+6*x-24*x^2-54*x^3+42*x^4+72*x^5-16*x^6-24*x^7) / (1-11*x+6*x^2+64*x^3-18*x^4-76*x^5+8*x^6+24*x^7) (conjectured). - Colin Barker, Jul 18 2017 PROG (S/R) stvar \$[N]:(0..M-1) init \$[]:=0 asgn \$[]->{*} kill +[i in 0..N-2]((\$[i]`-\$[i+1]`>5)+(\$[i+1]`-\$[i]`>5)) CROSSREFS Cf. Base 17 differing by four or less A126512, three or less A126485, two or less A126404, one or less A126371. Sequence in context: A176838 A176622 A125380 * A164746 A198859 A160295 Adjacent sequences: A126535 A126536 A126537 * A126539 A126540 A126541 KEYWORD nonn,base AUTHOR R. H. Hardin, Dec 28 2006 STATUS approved

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Last modified March 22 06:09 EDT 2023. Contains 361413 sequences. (Running on oeis4.)