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A016081 Add 4, then reverse digits; start with 3. 5
3, 7, 11, 51, 55, 95, 99, 301, 503, 705, 907, 119, 321, 523, 725, 927, 139, 341, 543, 745, 947, 159, 361, 563, 765, 967, 179, 381, 583, 785, 987, 199, 302, 603, 706, 17, 12, 61, 56, 6, 1, 5, 9, 31, 53, 75, 97, 101, 501, 505, 905, 909, 319, 323, 723, 727, 137, 141, 541 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

At 41st term, 1, the sequence joins the trajectory for a(1)=1, A119031. Cycle of length 54. - Zak Seidov, May 09 2006. (Corrected by N. J. A. Sloane, Aug 02 2009.)

LINKS

Table of n, a(n) for n=1..59.

MAPLE

rev:=proc(n) local nn: nn:=convert(n, base, 10): add(nn[j]*10^(nops(nn)-j), j= 1..nops(nn)) end proc: a[1]:=3: for n from 2 to 60 do a[n]:=rev(4+a[n-1]) end do: seq(a[n], n=1..60); # Emeric Deutsch, Aug 26 2007

MATHEMATICA

NestList[FromDigits[Reverse[IntegerDigits[#+4]]]&, 3, 60] (* Harvey P. Dale, Oct 01 2015 *)

PROG

(PARI) a=26; A016081=vector(99, i, a=fromdigits(Vecrev(digits(a+4)))) \\ M. F. Hasler, Mar 15 2022

(Python)

def A016081(N=99, a=3, d=4): # optional args: # terms, initial value, increment

   for _ in range(N): yield a; a=int(str(a+d)[::-1])

list(A016081()) # M. F. Hasler, Mar 15 2022

CROSSREFS

All of A003608, A016081, A016082 (and possibly others) eventually reach the trajectory of 1 shown in A119031. Cf. A055198.

Sequence in context: A217383 A005372 A125220 * A287301 A105762 A057469

Adjacent sequences:  A016078 A016079 A016080 * A016082 A016083 A016084

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v

EXTENSIONS

Corrected and extended by Franklin T. Adams-Watters, Mar 30 2006

Edited by N. J. A. Sloane at the suggestion of Andrew S. Plewe, Aug 23 2007

Name edited by M. F. Hasler, Mar 15 2022

STATUS

approved

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Last modified September 26 22:02 EDT 2022. Contains 357051 sequences. (Running on oeis4.)