A048971 Let d(n) = number of distinct primes dividing n (A001221); sequence gives t such that d(t)=d(t+1)=...=d(t+n-1) is a run of record length.

1, 14, 54, 91, 323, 44360, 48919, 218972, 534078, 2699915, 3355906, 17233173

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Example

54, 55, 56, 57, 58 is a run of length 5 in A001221 all with d = 2.

Crossrefs

Monotonic subsequence of A048932. Cf. A048972.

Sequence in context: A240811 A118856 A118530 * A299646 A006597 A304294

Adjacent sequences: A048968 A048969 A048970 * A048972 A048973 A048974

Keyword

more,nonn

Author

N. J. A. Sloane, Enoch Haga

Extensions

More terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Sep 04 2006

Status

approved