A101694 A101693(2^n).

1, 5, 21, 341, 87381, 5726623061, 24595658764946068821, 453709822561251284617832809909024281941, 154389452316421593898094646678250543804359979554187418719276778677217506186581

Offset

0,2

Links

Table of n, a(n) for n=0..8.

Formula

a(n)=A001045(2*(2^(n-1)+1))-2*0^n

Crossrefs

Sequence in context: A141798 A301797 A015461 * A006109 A009732 A009758

Adjacent sequences: A101691 A101692 A101693 * A101695 A101696 A101697

Keyword

easy,nonn

Author

Paul Barry, Dec 11 2004

Status

approved