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A003608
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Add 4, then reverse digits.
(Formerly M3339)
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5
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0, 4, 8, 21, 52, 65, 96, 1, 5, 9, 31, 53, 75, 97, 101, 501, 505, 905, 909, 319, 323, 723, 727, 137, 141, 541, 545, 945, 949, 359, 363, 763, 767, 177, 181, 581, 585, 985, 989, 399, 304, 803, 708, 217, 122, 621, 526, 35, 93, 79, 38, 24, 82, 68, 27, 13, 71, 57, 16, 2, 6, 1, 5, 9, 31, 53, 75, 97, 101, 501, 505
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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REFERENCES
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J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 15.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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Table of n, a(n) for n=0..70.
Nick Hobson, Python program for this sequence
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FORMULA
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Has period 54.
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MAPLE
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rev:=proc(n) local nn, nnn: nn:=convert(n, base, 10): add(nn[nops(nn)+1-j]*10^(j-1), j=1..nops(nn)) end: a[0]:=0: for n from 1 to 70 do a[n]:=rev(a[n-1]+4) od: seq(a[n], n=0..70); # Emeric Deutsch, Mar 07 2007
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MATHEMATICA
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NestList[FromDigits[Reverse[IntegerDigits[#+4]]]&, 0, 70] (* Harvey P. Dale, Jan 20 2014 *)
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CROSSREFS
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All of A003608, A016081, A016082 (and possibly others) eventually reach the trajectory of 1 shown in A119031. Cf. A055198.
Sequence in context: A261031 A077921 A097076 * A248423 A319565 A129794
Adjacent sequences: A003605 A003606 A003607 * A003609 A003610 A003611
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KEYWORD
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nonn,base
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AUTHOR
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N. J. A. Sloane, Mira Bernstein
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EXTENSIONS
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Corrected by Nick Hobson, Feb 21 2007
More terms from Emeric Deutsch, Mar 07 2007
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STATUS
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approved
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