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A032608 Concatenation of n and n + 3. 2
14, 25, 36, 47, 58, 69, 710, 811, 912, 1013, 1114, 1215, 1316, 1417, 1518, 1619, 1720, 1821, 1922, 2023, 2124, 2225, 2326, 2427, 2528, 2629, 2730, 2831, 2932, 3033, 3134, 3235, 3336, 3437, 3538, 3639, 3740, 3841, 3942, 4043, 4144, 4245 (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(log_10(n+3)+1) + n + 3, with n >= 1. - Paolo P. Lava, Oct 09 2008

MATHEMATICA

Table[FromDigits[Join[IntegerDigits[n], IntegerDigits[n+3]]], {n, 50}] (* Harvey P. Dale, Jul 11 2011 *)

#[[1]]*10^IntegerLength[#[[2]]]+#[[2]]&/@Table[{n, n+3}, {n, 50}] (* Harvey P. Dale, May 21 2018 *)

CROSSREFS

Cf. A001704, A020338.

Sequence in context: A061923 A031075 A020227 * A164403 A164398 A174519

Adjacent sequences:  A032605 A032606 A032607 * A032609 A032610 A032611

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998

STATUS

approved

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Last modified January 26 23:05 EST 2020. Contains 331289 sequences. (Running on oeis4.)