

A139284


Analog of A121805, but starting with 2.


3



2, 24, 71, 89, 180, 181, 192, 214, 256, 319, 413, 447, 522, 547, 623, 659, 756, 824, 872, 901, 920, 929, 1020, 1021, 1032, 1053, 1084, 1125, 1176, 1237, 1308, 1389, 1480, 1481, 1492, 1513, 1544, 1585, 1636, 1697, 1768, 1849, 1940, 1941, 1952, 1973, 2005
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OFFSET

1,1


COMMENTS

It appears that this sequence and A121805 have no terms in common. Furthermore, this sequence exists for at least 1551000000 terms.  Jacques ALARDET, Jul 22 2008
The last term of the sequence is a(194697747222394) = 9999999999999918.  Giovanni Resta, Nov 30 2019


REFERENCES

E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 3235, Volume 59 (Jeux math'), April/June 2008, Paris.


LINKS

Table of n, a(n) for n=1..47.
Carlos Rivera, Puzzle 980. The "Commas" sequence, The Prime Puzzles and Problems Connection.


MAPLE

a:= proc(n) option remember; local k, t, y; if n=1 then 2 else k:= a(n1); for y from 0 to 9 do t:= k +10* irem (k, 10) +y; if convert (t, base, 10)[ 1]=y then return t fi od; NULL fi end: seq(a(n), n=1..80); # Alois P. Heinz, Aug 13 2009


MATHEMATICA

a[1] = 2; a[n_] := a[n] = For[x=Mod[a[n1], 10]; y=0, y <= 9, y++, an = a[n1] + 10*x + y; If[y == IntegerDigits[an][[1]], Return[an]]]; Array[a, 80] (* JeanFrançois Alcover, Nov 25 2014 *)


CROSSREFS

Cf. A121805.
Sequence in context: A068878 A100918 A152965 * A003614 A195189 A119060
Adjacent sequences: A139281 A139282 A139283 * A139285 A139286 A139287


KEYWORD

nonn,base,fini,changed


AUTHOR

N. J. A. Sloane (based on Angelini's article), Jun 08 2008


EXTENSIONS

More terms from Alois P. Heinz, Aug 13 2009


STATUS

approved



