

A099728


Least number B such that (A001359(n)  B^2)^2  B is also the lesser of larger twin primes, or 0 if no such B exists.


1



380, 14, 5, 5, 365, 8, 5, 5, 14, 20, 5, 20, 8, 65, 8, 95, 35, 8, 14, 65, 20, 65, 8, 17, 350, 188, 5, 104, 98, 68, 35, 17, 158, 35, 92, 50, 62, 5, 26, 8, 8, 68, 233, 110, 5, 50, 23, 23, 8, 65, 59, 35, 14, 23, 35, 20, 47, 140, 5, 50, 14, 5, 4, 4, 125, 386, 713, 23, 59, 44, 635, 98
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

Conjecture: No term is zero.


LINKS

Table of n, a(n) for n=1..72.


EXAMPLE

a(3)=5. A001359(3)=11. 11 and 13 are twin primes. (115^2)^2  5 = 191. 191 and 193 are also twin primes.


MAPLE

a135 := [] : f := fopen("b001359.txt", READ) : while nops(a135) < 200 do l := fscanf(f, "%d %d") : if l = [] then break : else a135 := [op(a135), l[2]] : fi ; od : for n from 1 to nops(a135) do a := op(n, a135) : B := 0 : while true do srch := (aB^2)^2B ; if isprime(srch) and isprime(srch+2) and srch > a then printf("%d, ", B) ; break ; fi ; B := B+1 : od : od: # R. J. Mathar, Aug 06 2007


CROSSREFS

Sequence in context: A133961 A133962 A027503 * A206349 A252130 A252123
Adjacent sequences: A099725 A099726 A099727 * A099729 A099730 A099731


KEYWORD

nonn


AUTHOR

Ray G. Opao, Nov 07 2004


EXTENSIONS

Corrected and extended by R. J. Mathar, Aug 06 2007


STATUS

approved



