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A124945 n and n+10 are 10-almost primes. 2
506240, 789750, 1325312, 1567350, 1761750, 1944800, 2450240, 2579840, 3004928, 3013686, 3093750, 3153654, 3713526, 3844736, 3906240, 4024566, 4394240, 5244416, 5402240, 5431040, 6208640, 6310710, 6932790, 7053750, 7352694, 7585974, 8005878, 8043776, 8099190 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

First term 506240 = A098515(10).

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

EXAMPLE

506240=2^7*5*7*113, 506250=2*3^4*5^5;

789750=2*3^5*5^3*13, 789760=2^8*5*617;

1325312=2^8*31*167, 1325322=2*3^8*101;

1567350=2*3^6*5^2*43, 1567360=2^7*5*31*79.

PROG

(PARI) isok(n) = (bigomega(n) == 10) && (bigomega(n+10) == 10); \\ Michel Marcus, Oct 11 2013

(PARI) P=prod(i=1, 25, prime(i))^10; v=List(); for(n=1, 1e6, g1=gcd(n, P); o1=bigomega(g1); if(o1<5, next); g2=gcd(n+10, P); o2=bigomega(g2); if(o2>=5 && o1+bigomega(n/g1)==10 && o2+bigomega((n+10)/g2)==10, listput(v, n))); Vec(v) \\ Charles R Greathouse IV, Oct 11 2013

CROSSREFS

Cf. A098515, A124940, A124941, A124942.

Sequence in context: A183789 A203548 A195525 * A205167 A252776 A271583

Adjacent sequences:  A124942 A124943 A124944 * A124946 A124947 A124948

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 13 2006

EXTENSIONS

More terms from Michel Marcus, Oct 11 2013

STATUS

approved

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Last modified December 4 13:29 EST 2021. Contains 349526 sequences. (Running on oeis4.)