1,1

A089392 has no members with 10, 11, or 12 digits. It is unlikely that it has any with more than 12 digits. - David Wasserman (wasserma(AT)spawar.navy.mil), Sep 15 2005

with(combinat): ds:=proc(s) local j: RETURN(add(s[j]*10^(j-1), j=1..nops(s))):end: for d from 1 to 6 do sch:=[seq([1, op(i), d+1], i=[[], seq([j], j=2..d)])]: for n from 10^d-1 by -1 to 10^(d-1) do sn:=convert(n, base, 10): fl:=0: for s in sch do m:=add(j, j=[seq(ds(sn[s[i]..s[i+1]-1]), i=1..nops(s)-1)]): if not isprime(m) then fl:=1: break fi od: if fl=0 then printf("%d, ", n):break fi od od: (C. Ronaldo)

Cf. A089392, A089393.

Sequence in context: A036902 A142204 A071363 this_sequence A068692 A053302 A068877

Adjacent sequences: A089391 A089392 A089393 this_sequence A089395 A089396 A089397

base,nonn

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 10 2003

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Dec 25 2004

3 more terms from David Wasserman (wasserma(AT)spawar.navy.mil), Sep 15 2005