A254003 For n>=1, let B_n(k) be the sequence defined by b(1)=1, b(2)=p_1, ..., b(n+2)=p_(n+1), thereafter (for k>=n+3) the smallest number not occurring earlier having at least one common factor with b(k-(n+1)), but none with b(k-1)*b(k-2)*...*b(k-n); a(n) is m such that B_n(m)=6.

10, 14, 83, 157, 1190, 206

Offset

1,1

Comments

In particular, A098550(10)=6, A247225(14)=6.

On the other hand, it seems likely that 6 never appears in A247665 (which has a different although related definition). - N. J. A. Sloane, Apr 26 2015

Links

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

Crossrefs

Cf. A098550, A247225, A247665.

Sequence in context: A025122 A173684 A258287 * A219682 A167334 A236145

Adjacent sequences: A254000 A254001 A254002 * A254004 A254005 A254006

Keyword

nonn,more

Author

Vladimir Shevelev and Peter J. C. Moses, Jan 22 2015

Status

approved