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A033077
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Numbers n with property that all pairs of consecutive base 6 digits differ by 3.
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0
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1, 2, 3, 4, 5, 10, 17, 18, 25, 32, 61, 104, 111, 154, 197, 370, 629, 666, 925, 1184, 2221, 3776, 3999, 5554, 7109, 13330, 22661, 23994, 33325, 42656, 79981, 135968, 143967, 199954, 255941, 479890, 815813, 863802, 1199725, 1535648, 2879341
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| G.f.: (1+2*x+3*x^2+4*x^3+5*x^4+4*x^5+5*x^6+1*x^8+2*x^9)*x / (1-6*x^5-1*x^10+6*x^15). - Alois P. Heinz, Feb 25 2011
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MAPLE
| a:= proc(n) local c, d, i, m; c, d:= 0, 1+irem (n-1, 5, 'm'); for i to m+1 do c:= 6*c +d; d:= d +`if` (d<3, 3, -3) od; c end:
seq (a(n), n=1..50); # Alois P. Heinz, Feb 26 2011
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CROSSREFS
| Sequence in context: A134220 A179146 A099161 * A190912 A111665 A111666
Adjacent sequences: A033074 A033075 A033076 * A033078 A033079 A033080
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KEYWORD
| nonn,base
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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