A089397 Largest n-digit member of A089395.

6, 82, 982, 9748, 96052, 992548

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Maple

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:=mul(j, j=[seq(ds(sn[s[i]..s[i+1]-1]), i=1..nops(s)-1)])+1: if not isprime(m) then fl:=1: break fi od: if fl=0 then printf("%d, ", n):break fi od od: # C. Ronaldo

Crossrefs

Cf. A089392, A089393, A089394, A089395, A089396.

Sequence in context: A032491 A135624 A222197 * A089701 A360346 A251584

Adjacent sequences: A089394 A089395 A089396 * A089398 A089399 A089400

Keyword

base,nonn

Author

Amarnath Murthy, Nov 10 2003

Extensions

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

Status

approved