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A032612 Concatenation of n and n+7. 2
18, 29, 310, 411, 512, 613, 714, 815, 916, 1017, 1118, 1219, 1320, 1421, 1522, 1623, 1724, 1825, 1926, 2027, 2128, 2229, 2330, 2431, 2532, 2633, 2734, 2835, 2936, 3037, 3138, 3239, 3340, 3441, 3542, 3643, 3744, 3845, 3946, 4047, 4148, 4249 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

FORMULA

a(n)=n*10^floor(log10(n+7)+1)+n+7, with n>=0 [From Paolo P. Lava, Oct 09 2008]

CROSSREFS

Cf. A001704, A020338.

Sequence in context: A205871 A144833 A259635 * A151700 A154367 A161164

Adjacent sequences:  A032609 A032610 A032611 * A032613 A032614 A032615

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998

STATUS

approved

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Last modified March 19 23:02 EDT 2019. Contains 321343 sequences. (Running on oeis4.)