A124945 n and n+10 are 10-almost primes.

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

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