A259238 The bases corresponding to A257751.

-3, -5, -8, 3, -7, -9, 9, -7, 7, -11, 3, -15, 1, -17, -13, -15, -1, -13, 2, -20, 5, -19, -21, 5, -23, -27, -15, -3, -28, -25, 13, -4, -1, -35, -29, 4, -39, -35, 1, -41, -25, -39, 7, 3, -39, 13, -31, -21, 7, -40, -35, -3, 9, 23, -31, 1, -33, -29, 21, -31, -44

Offset

1,1

Links

Tim Johannes Ohrtmann, Table of n, a(n) for n = 1..14679

Example

a(1) = -3 because this is the integer except 0 such that for every prime factor p of A257751(1) applies that p+b divides n+b: 35=5*7 and 2, 4 both divide 32.

Prog

(PARI) for(n=2, 1000000, if(!isprime(n), if(issquarefree(n), f=factor(n); k=0; for(b=-(f[1, 1]-1), n, c=0; for(i=1, #f[, 1], if((n+b)%(f[i, 1]+b)>0, c++)); if(c==0, if(!b==0, k++; a=b))); if(k==1, print1(a, ", ")))))

Crossrefs

Sequence in context: A010617 A016659 A019830 * A094355 A087334 A175628

Adjacent sequences: A259235 A259236 A259237 * A259239 A259240 A259241

Keyword

sign

Author

Tim Johannes Ohrtmann, Jun 22 2015

Status

approved