A032642 - OEIS

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A032642

Numbers k such that k concatenated with k+2 is a lucky number.

1

1, 7, 19, 25, 31, 49, 61, 65, 71, 77, 101, 103, 107, 121, 125, 133, 139, 149, 157, 169, 173, 193, 205, 221, 233, 245, 295, 349, 359, 371, 385, 391, 413, 425, 431, 445, 457, 463, 479, 481, 517, 527, 533, 553, 575, 583, 587, 593, 605, 611, 617, 637, 641, 643

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..54.

CROSSREFS

Cf. A000959, A032652.

Sequence in context: A176182 A292349 A065749 * A127633 A055246 A003282

Adjacent sequences: A032639 A032640 A032641 * A032643 A032644 A032645

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998

EXTENSIONS

More terms from Sascha Kurz, Mar 24 2002

STATUS

approved