0,1

a(n)=ceiling(c^(2^n)) where c=(5+sqrt(21))/20 is the largest root of x^2-5x+1=0. - Benoit Cloitre, Dec 03, 2002

Cf. A001566 (starting with 3), A003010 (starting with 4), A003423 (starting with 6)

Sequence in context: A023275 A018899 A080990 this_sequence A055490 A002811 A120660

Adjacent sequences: A003484 A003485 A003486 this_sequence A003488 A003489 A003490

nonn

njas