A120218 - OEIS

A120218

Start with 100103 and repeatedly reverse the digits and add 2 to get the next term.

100103, 301003, 300105, 501005, 500107, 701007, 700109, 901009, 900111, 111011, 110113, 311013, 310115, 511015, 510117, 711017, 710119, 911019, 910121, 121021, 120123, 321023, 320125, 521025, 520127, 721027, 720129, 921029, 920131, 131031

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OFFSET

1,1

COMMENTS

Let T(S,Q) be the sequence obtained by starting with S and repeatedly reversing the digits and adding Q to get the next term. This is T(100103,2). 100103 is the first S for which T(S,2) reaches a cycle of length 900. The cycle is simply the first 900 terms, which then repeat. A full period is given in the table.

LINKS

Klaus Brockhaus, Table of n, a(n) for n = 1..900

N. J. A. Sloane and others, Sequences of RADD type, OEIS wiki.

Index entries for linear recurrences with constant coefficients, order 900.

MATHEMATICA

NestList[FromDigits[Reverse[IntegerDigits[#]]]+2&, 100103, 30] (* Harvey P. Dale, Aug 14 2012 *)

CROSSREFS

Cf. A117521, A118514, A120214, A120215, A120216, A120217.

Sequence in context: A182092 A249855 A120217 * A365375 A235901 A251171

Adjacent sequences: A120215 A120216 A120217 * A120219 A120220 A120221

KEYWORD

nonn,base

AUTHOR

Klaus Brockhaus, Jun 11 2006

STATUS

approved