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 A181720 a(n) = smallest multiple of n which contains its base 10 reversal as a substring. 2
 1, 2, 3, 4, 5, 6, 7, 8, 9, 1010, 11, 216, 312, 1414, 510, 1616, 714, 810, 912, 1020, 126, 22, 322, 2424, 525, 624, 729, 1820, 928, 3030, 713, 2304, 33, 3434, 3535, 3636, 1073, 836, 936, 1040, 1148, 924, 344, 44, 540, 644, 1974, 384, 294, 1050, 153, 2548, 3551, 1458, 55, 5656, 4275, 1856, 295, 3060 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Leading 0's are kept in the reversal: e.g., a(10)=1010, not 10. LINKS Ivan Neretin, Table of n, a(n) for n = 1..10000 PROG (Perl) foreach \$n(1..60) {\$r=reverse(\$_=\$n); \$_+=\$n until m/\$r/; print "\$n \$_\n"} # Ivan Neretin, Aug 12 2015 CROSSREFS Cf. A181721 (a(n)/n). Sequence in context: A121939 A276697 A087036 * A349423 A004904 A122624 Adjacent sequences: A181717 A181718 A181719 * A181721 A181722 A181723 KEYWORD nonn,base AUTHOR Claudio Meller, Nov 17 2010 EXTENSIONS Edited by D. S. McNeil, Nov 17 2010 STATUS approved

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Last modified June 9 01:30 EDT 2023. Contains 363168 sequences. (Running on oeis4.)