A244361 - OEIS

%I #18 May 04 2023 09:52:24

%S 1,2,3,4,4,6,5,8,8,10,7,12,8,13,13,16,10,18,11,20,18,19,13,24,17,22,

%T 22,28,16,30,17,32

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

%C Partial sums give A244360. - _Omar E. Pol_, Oct 18 2014

%F a(n) = A244363(n)/2.

%F a(n) = A244371(n)/8. - _Omar E. Pol_, Oct 18 2014

%Y Cf. A000203, A237270, A237271, A237591, A237593, A244360, A244362, A244363, A244370, A244371, A279228.

%K nonn,more

%O 1,2

%A _Omar E. Pol_, Jun 26 2014

%E a(13)-a(28) from _Omar E. Pol_, Oct 18 2014

%E a(29)-a(32) from _Omar E. Pol_, May 04 2023