A248555 - OEIS

%I #14 Jul 01 2021 19:03:28

%S 132,465,798,101211,131514,161817,192120,222423,252726,283029,313332,

%T 343635,373938,404241,434544,464847,495150,525453,555756,586059,

%U 616362,646665,676968,707271,737574,767877,798180,828483,858786,889089,919392

%N a(n) is the concatenation of 3n-2, 3n and 3n-1.

%H Harvey P. Dale, <a href="/A248555/b248555.txt">Table of n, a(n) for n = 1..1000</a>

%p read("transforms") ;

%p A248555 := proc(n)

%p     digcatL([3*n-2,3*n,3*n-1]) ;

%p end proc:

%p seq(A248555(n),n=1..70) ;  # _R. J. Mathar_, Jan 22 2015

%t FromDigits[Flatten[IntegerDigits/@{#-2,#,#-1}]]&/@(3*Range[40]) (* _Harvey P. Dale_, Jul 01 2021 *)

%K nonn,base,less

%O 1,1

%A _Charles Duvall_, Oct 08 2014