login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A244363 Number of toothpicks added at n-th stage in the toothpick structure of the symmetric representation of sigma in the first quadrant (without the axis x and y). 10

%I

%S 2,4,6,8,8,12,10,16,16,20,14,24,16,26,26,32,20,36,22,40,36,38,26,48,

%T 34,44,44,56

%N Number of toothpicks added at n-th stage in the toothpick structure of the symmetric representation of sigma in the first quadrant (without the axis x and y).

%C Partial sums give A244362. - _Omar E. Pol_, Oct 18 2014

%C a(n) is also the sum of semiperimeters of the parts of the symmetric representation of sigma(n). - _Omar E. Pol_, Dec 11 2016

%F a(n) = 2*A244361(n).

%F a(n) = A244371(n)/4. - _Omar E. Pol_, Oct 18 2014

%F a(n) = A274919(n)/2. - _Omar E. Pol_, Dec 11 2016

%Y Cf. A000203, A196020, A237270, A237271, A237593, A244360, A244361, A244362, A244370, A244371, A245092, A262626, A274919.

%K nonn,more

%O 1,1

%A _Omar E. Pol_, Jun 26 2014

%E More terms from _Omar E. Pol_, Oct 18 2014

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 26 12:00 EDT 2020. Contains 337371 sequences. (Running on oeis4.)