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A186436
Smallest number that equals n times its last digit, or 0 if no such number exists.
1
1, 0, 15, 0, 25, 12, 35, 0, 45, 0, 11, 0, 65, 0, 75, 32, 85, 0, 95, 0, 21, 0, 115, 0, 125, 52, 135, 0, 145, 0, 31, 0, 165, 0, 175, 72, 185, 0, 195, 0, 41, 0, 215, 0, 225, 92, 235, 0, 245, 0, 51, 0, 265, 0, 275, 112, 285, 0, 295, 0, 61, 0, 315, 0, 325, 132, 335, 0, 345, 0, 71, 0
OFFSET
1,3
EXAMPLE
a(7) = 35 because last digit of 35 is 5 and 7*5 = 35, and there is no number < 35 that satisfies the condition.
MAPLE
with(numtheory):for k from 1 to 100 do:id:=0:for n from 1 to 2000 while(id=0)
do:x:=irem(n, 10):if n=k*x then n0:=n:id:=1:else fi:od:if id=1 then printf(`%d,
`, n0):else printf(`%d, `, 0):fi:od:
PROG
(Magma) A186436:=function(n); for j in [1..9] do a:=n*j; if j eq Intseq(a)[1] then return a; end if; end for; return 0; end function; [ A186436(n): n in [1..100] ]; // Klaus Brockhaus, Feb 22 2011
CROSSREFS
Sequence in context: A067154 A187486 A141027 * A054670 A277929 A303231
KEYWORD
nonn,easy,base
AUTHOR
Michel Lagneau, Feb 21 2011
STATUS
approved