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A085128 Multiples of 5 which are members of A002473. Or multiples of 5 with the largest prime divisor <= 7. 7

%I #22 Aug 15 2017 10:36:35

%S 5,10,15,20,25,30,35,40,45,50,60,70,75,80,90,100,105,120,125,135,140,

%T 150,160,175,180,200,210,225,240,245,250,270,280,300,315,320,350,360,

%U 375,400,405,420,450,480,490,500,525,540,560,600,625,630,640,675,700

%N Multiples of 5 which are members of A002473. Or multiples of 5 with the largest prime divisor <= 7.

%F a(n) = 5*A002473(n). - _Michel Marcus_, Aug 15 2017

%o (PARI) lista(nn) = {for (n=1, nn, if (vecmax(factor(5*n)[,1]) <= 7, print1(5*n, ", ")););} \\ _Michel Marcus_, Aug 15 2017

%Y Intersection of A008587 (multiples of 5) and A002473 (7-smooth numbers).

%Y Cf. A080194, A085125, A085126, A085127, A085129, A085131, A085132.

%K base,easy,nonn

%O 1,1

%A _Amarnath Murthy_, Jul 06 2003

%E More terms from _David Wasserman_, Jan 28 2005

%E Offset corrected by _Michel Marcus_, Aug 15 2017

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Last modified April 16 01:01 EDT 2024. Contains 371696 sequences. (Running on oeis4.)