0,10

a(n) = #{k: A008963(k) = 3 and 0<=k<=n};

a(A105503(n)) = a(A105503(n) - 1) + 1;

n = A105511(n) + A105512(n) + a(n) + A105514(n) + A105515(n) + A105516(n) + A105517(n) + A105518(n) + A105519(n).

Table of n, a(n) for n=0..94.

Cf. A000030, A000045.

Sequence in context: A056813 A125269 A077430 * A004233 A130259 A068549

Adjacent sequences: A105510 A105511 A105512 * A105514 A105515 A105516

nonn,base

Reinhard Zumkeller, Apr 11 2005

approved