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A003608 Add 4, then reverse digits.
(Formerly M3339)
5
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)
OFFSET

0,2

REFERENCES

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).

LINKS

Table of n, a(n) for n=0..70.

Nick Hobson, Python program for this sequence

FORMULA

Has period 54.

MAPLE

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

MATHEMATICA

NestList[FromDigits[Reverse[IntegerDigits[#+4]]]&, 0, 70] (* Harvey P. Dale, Jan 20 2014 *)

CROSSREFS

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 A129794 A064503

Adjacent sequences:  A003605 A003606 A003607 * A003609 A003610 A003611

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Mira Bernstein

EXTENSIONS

Corrected by Nick Hobson, Feb 21 2007

More terms from Emeric Deutsch, Mar 07 2007

STATUS

approved

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Last modified November 18 02:54 EST 2017. Contains 294840 sequences.