A124946 n and n+9 are 9-almost primes.

268992, 338976, 516375, 675783, 922176, 984375, 1060695, 1107351, 1164375, 1216215, 1233216, 1361367, 1388736, 1458720, 1668672, 1843632, 1877175, 2018592, 2075463, 2317491, 2333520, 2395575, 2440935, 2457936, 2495367, 2499255, 2546775, 2559375, 2811744

Offset

1,1

Comments

First term 268992 = A098515(9).

The first term not divisible by 9 is a(163) = 9384375. The first term not divisible by 3 is a(193) = 10504375. - Charles R Greathouse IV, Oct 11 2013

Links

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

Example

268992=2^6*3^2*467, 268992+9=269001=3^8*41;
338976=2^5*3^2*11*107, 338976+9=338985=3^7*5*31.

Prog

(PARI) isok(n) = (bigomega(n) == 9) && (bigomega(n+9) == 9); \\ Michel Marcus, Oct 11 2013

Crossrefs

Cf. A098515, A124940, A124941, A124942, A124945.

Sequence in context: A203793 A231197 A061736 * A203940 A139028 A249254

Adjacent sequences: A124943 A124944 A124945 * A124947 A124948 A124949

Keyword

nonn

Author

Zak Seidov, Nov 13 2006

Extensions

More terms from Michel Marcus, Oct 11 2013

Status

approved