A077001 a(1) = 1, a(n+1) is the largest squarefree number <= n*a(n).

2, 2, 3, 7, 26, 130, 779, 5453, 43622, 392597, 3925970, 43185670, 518228039, 6736964507, 94317503097, 1414762546454, 22636200743263, 384815412635471, 6926677427438474, 131606871121331006, 2632137422426620118

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Maple

with(numtheory):a[1] := 2:for n from 2 to 34 do q := a[n-1]*(n-1):while(not issqrfree(q)) do q := q-1:od:a[n] := q:od:seq(a[l], l=1..34);

Crossrefs

Sequence in context: A293246 A185387 A038507 * A180996 A307503 A087522

Adjacent sequences: A076998 A076999 A077000 * A077002 A077003 A077004

Keyword

nonn

Author

Amarnath Murthy, Oct 26 2002

Extensions

More terms from Sascha Kurz, Jan 26 2003

Status

approved