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

0,2

Sequence found by reading the line from 0, in the direction 0, 24,..., in the square spiral whose vertices are the generalized tetradecagonal numbers A195818.

Table of n, a(n) for n=0..39.

a(n) = 24*A000290(n) = 12*A001105(n) = 8*A033428(n) = 6*A016742(n) = 4*A033581(n) = 3*A139098(n) = 2*A135453(n).

Bisection of A195158.

Sequence in context: A057103 A055669 A209432 * A183009 A225790 A042122

Adjacent sequences: A195821 A195822 A195823 * A195825 A195826 A195827

nonn,easy

Omar E. Pol, Sep 28 2011

approved