A214633 a(1)=2; a(n) is smallest prime of the form k*a(n-1) + 3, k>0.

2, 5, 13, 29, 61, 491, 3931, 15727, 157273, 314549, 4403689, 17614759, 387524701, 5425345817, 119357607977, 9787323854117, 78298590832939, 1722568998324661, 68902759932986443, 4685387675443078127, 318606361930129312639, 637212723860258625281

Offset: 1

Author

Robin Garcia, Jul 23 2012

Keywords

• nonn

Links

• Robert Israel, Table of n, a(n) for n = 1..391

Crossrefs

Cf. A061092, A059411, A214523, A214632.

Programs

Maple

A214633 := proc(n)
    option remember;
    local k;
    if n =  1 then
        2;
    else
        for k from 1 do
            if isprime(k*procname(n-1)+3) then
                return k*procname(n-1)+3 ;
            end if;
        end do:
    end if;
end proc:
seq(A214633(n),n=1..20) ; # R. J. Mathar, Jul 23 2012