1,3

Complement of A118066.

Table of n, a(n) for n=1..72.

Eric Weisstein's World of Mathematics, Hofstadter Sequences

a(20) = a(11) + a(10) = 11 + 10 = 21;

a(21) = a(9) + a(8) + a(7) = 9 + 7 + 6 = 22;

a(22) = a(12) + a(11) = 12 + 11 = 23;

a(23) = a(13) + a(12) = 13 + 12 = 25;

a(24) = a(10) + a(9) + a(8) = 10 + 9 + 7 = 26.

Cf. A005243.

Sequence in context: A037477 A277050 A013937 * A020661 A284837 A068937

Adjacent sequences: A118062 A118063 A118064 * A118066 A118067 A118068

nonn

Reinhard Zumkeller, Apr 11 2006

approved