A030642 Product of next 2 primes.

2, 15, 323, 111547, 12449873237, 154999344563559225589, 24024796815132956872884975543558130445497

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Formula

a(n) = A030661(a(n-1)). - R. J. Mathar, Aug 09 2019

Maple

A030642 := proc(n)
    option remember ;
    if n = 1 then
        2;
    else
        A030661(procname(n-1)) ;
    end if;
end proc:
seq(A030642(n), n=1..6) ;  R. J. Mathar, Aug 09 2019

Mathematica

NestList[NextPrime[#]NextPrime[#, 2]&, 2, 6] (* Harvey P. Dale, Nov 30 2025 *)

Crossrefs

Cf. A000040, A030641.

Sequence in context: A003025 A015200 A331344 * A365358 A297077 A175563

Adjacent sequences: A030639 A030640 A030641 * A030643 A030644 A030645

Keyword

nonn

Author

N. J. A. Sloane

Status

approved