A053065 Alternately append n-th prime to beginning or end of previous term.

2, 32, 325, 7325, 732511, 13732511, 1373251117, 191373251117, 19137325111723, 2919137325111723, 291913732511172331, 37291913732511172331, 3729191373251117233141, 433729191373251117233141, 43372919137325111723314147

Offset

1,1

References

Felice Russo, A set of new Smarandache functions, sequences and conjectures in number theory, American Research Press 2000

Links

Table of n, a(n) for n=1..15.

Maple

read("transforms"):
A053065 := proc(n)
    option remember;
    if n = 1 then
        2;
    else
        p := ithprime(n) ;
        if type(n, 'even') then
            digcat2(p, procname(n-1)) ;
        else
            digcat2(procname(n-1), p) ;
        end if;
    end if;
end proc:
seq(A053065(n), n=1..15) ; # R. J. Mathar, Sep 27 2013

Crossrefs

Sequence in context: A203017 A079766 A224293 * A091707 A323639 A060868

Adjacent sequences: A053062 A053063 A053064 * A053066 A053067 A053068

Keyword

base,easy,nonn,less

Author

Felice Russo, Feb 25 2000

Status

approved