Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

1,1

a(n) is the position of the second appearance of n in A117384, where A117384(m) = A117384(k) and k = 4*A117384(m) - m. The Connell sequence (A001614) is generated as: 1 odd, 2 even, 3 odd, ...

A171152 gives partial sums. [From Gerald Hillier, Dec 07 2009]

Table of n, a(n) for n=1..64.

A001614(n) = A118012( a(n) ).

a(n)=2n+[(1+sqrt(8n-7))/2].- Juri-Stepan Gerasimov Aug 25 2009

Cf. A001614, A117384, A118012.

Sequence in context: A140482 A212451 A244223 * A189679 A190229 A190085

Adjacent sequences: A118008 A118009 A118010 * A118012 A118013 A118014

nonn

Paul D. Hanna, Apr 10 2006

approved