A281222 Products of 10 distinct primes (squarefree 10-almost primes).

6469693230, 6915878970, 8254436190, 8720021310, 9146807670, 9592993410, 10407767370, 10485364890, 10555815270, 11125544430, 11532931410, 11797675890, 11823922110, 12095513430, 12328305990, 12598876290, 12929686770, 13162479330, 13220677470, 13467764310

Offset

1,1

Links

Rick L. Shepherd and Giovanni Resta, Table of n, a(n) for n = 1..10000 (first 231 terms from Rick L. Shepherd)

Formula

A005117 INTERSECT A046314.

Example

a(1) = 2*3*5*7*11*13*17*19*23*29 = 6469693230 = prime(10)# = A002110(10), the 10th primorial number.

Prog

(PARI) IsInA281222(n) = n > 0 && issquarefree(n) && bigomega(n) == 10
(PARI) list(lim, pr=10, maxp=oo)=if(pr==1, return(primes([2, min(lim\1, maxp)]))); my(v=List(), pr1=pr-1, mx=prod(i=1, pr1, prime(i))); forprime(p=prime(pr), min(lim\mx, maxp), my(u=list(lim\p, pr1, p-1)); for(i=1, #u, listput(v, p*u[i]))); Set(v) \\ Charles R Greathouse IV, Feb 03 2023

Crossrefs

Cf. A005117, A046314.

Sequence in context: A172534 A198807 A358489 * A258365 A127342 A336681

Adjacent sequences: A281219 A281220 A281221 * A281223 A281224 A281225

Keyword

nonn

Author

Rick L. Shepherd, Jan 17 2017

Status

approved