The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A068823 a(n) = lcm(n, c(n)), where c(n) is the 10's complement of n. 1
 9, 8, 21, 12, 5, 12, 21, 8, 9, 90, 979, 264, 1131, 602, 255, 336, 1411, 738, 1539, 80, 1659, 858, 1771, 456, 75, 962, 1971, 504, 2059, 210, 2139, 544, 2211, 1122, 455, 576, 2331, 1178, 2379, 120, 2419, 1218, 2451, 616, 495, 1242, 2491, 624, 2499, 50 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Alois P. Heinz, Table of n, a(n) for n = 1..10000 EXAMPLE a(45) = 495 as 10's complement of 45 is 100 - 45 = 55 and lcm(45, 55) = 495. MAPLE a:=n-> ilcm((10^length(n)-n), n): seq(a(n), n=1..100);  # Alois P. Heinz, Sep 22 2015 MATHEMATICA LCM[#, 10^(IntegerLength[#]) - #] & /@ Range[50] (* Jayanta Basu, Aug 07 2013 *) CROSSREFS Cf. A068822. Sequence in context: A296615 A340446 A063561 * A264301 A251091 A159078 Adjacent sequences:  A068820 A068821 A068822 * A068824 A068825 A068826 KEYWORD easy,nonn,look,base AUTHOR Amarnath Murthy, Mar 08 2002 EXTENSIONS a(20) corrected by Jayanta Basu, Aug 07 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 13 03:13 EDT 2021. Contains 343836 sequences. (Running on oeis4.)