A207637 Squarefree sums of 3 successive primes.

10, 15, 23, 31, 41, 59, 71, 83, 97, 109, 131, 143, 159, 173, 187, 199, 211, 223, 235, 251, 269, 287, 301, 311, 319, 329, 349, 371, 395, 407, 439, 457, 471, 487, 503, 519, 533, 551, 565, 581, 589, 607, 633, 661, 679, 689, 701, 713, 731, 749, 771, 789, 803

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

Select[Table[Prime[n] + Prime[n + 1] + Prime[n + 2], {n, 300}], SquareFreeQ]

Prog

(PARI) p=2; q=3; forprime(r=5, 1e4, if(issquarefree(t=p+q+r), print1(t", ")); p=q; q=r) \\ Charles R Greathouse IV, Jun 14 2013

Crossrefs

Cf. A206329.

Sequence in context: A373613 A050200 A034961 * A171444 A227371 A057990

Adjacent sequences: A207634 A207635 A207636 * A207638 A207639 A207640

Keyword

nonn,easy

Author

Vladimir Joseph Stephan Orlovsky, Feb 19 2012

Status

approved