A321617 Last term of the first occurrence of n consecutive odd squarefree composite numbers.

15, 35, 95, 219, 221, 903, 905, 1357

Offset

1,1

Comments

See A322493.

Links

Table of n, a(n) for n=1..8.

Mathematica

Join[{15}, With[{osc=Select[Range[1, 1401, 2], CompositeQ[#]&&SquareFreeQ[ #]&]}, Flatten[Table[Select[Partition[osc, n, 1], Union[Differences[#]] == {2}&, 1], {n, 8}], 1]][[All, -1]]] (* Harvey P. Dale, Feb 10 2019 *)

Crossrefs

Cf. A024556, A322493.

Sequence in context: A061367 A070161 A142591 * A254031 A074480 A194580

Adjacent sequences: A321614 A321615 A321616 * A321618 A321619 A321620

Keyword

nonn,fini,full

Author

Hugo Pfoertner, Dec 19 2018

Status

approved