A348072 Numbers k such that omega(k) = 8.

9699690, 11741730, 13123110, 14804790, 15825810, 16546530, 17160990, 17687670, 18888870, 19399380, 20030010, 20281170, 20930910, 21111090, 21411390, 21637770, 21951930, 23130030, 23393370, 23483460, 23993970, 24534510, 25555530, 25571910, 26193090, 26246220, 26816790, 26996970

Offset

1,1

Links

David A. Corneth, Table of n, a(n) for n = 1..10000

Prog

(PARI) is(n) = omega(n) == 8
(PARI) A246655(lim)=my(v=List(primes([2, lim\=1]))); for(e=2, logint(lim, 2), forprime(p=2, sqrtnint(lim, e), listput(v, p^e))); Set(v)
list(lim, pr=8)=if(pr==1, return(A246655(lim))); my(v=List(), pr1=pr-1, mx=prod(i=1, pr1, prime(i))); forprime(p=prime(pr), lim\mx, my(u=list(lim\p, pr1)); for(i=1, #u, listput(v, p*u[i]))); Set(v) \\ Charles R Greathouse IV, Feb 03 2023

Crossrefs

Row 8 of A125666.

Cf. A001221, A048692.

Sequence in context: A251504 A103936 A147713 * A123322 A258363 A147575

Adjacent sequences: A348069 A348070 A348071 * A348073 A348074 A348075

Keyword

nonn

Author

David A. Corneth, Oct 10 2021

Status

approved