1,1

Complement of A000292; A000040 is a subsequence;

A014306(a(n)) = 1; A023533(a(n)) = 0.

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

Cristinel Mortici, Remarks on Complementary Sequences, Fibonacci Quart. 48 (2010), no. 4, 343-347.

(PARI) is(n)=binomial(sqrtnint(6*n, 3)+2, 3)!=n \\ Charles R Greathouse IV, Feb 22 2017

Sequence in context: A268231 A039167 A247360 * A183570 A181092 A184526

Adjacent sequences: A145394 A145395 A145396 * A145398 A145399 A145400

nonn

Reinhard Zumkeller, Oct 14 2008

Definition corrected by Ant King, Sep 20 2012

approved