A244361 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).

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, 22, 28, 16, 30, 17, 32

Offset: 1

Author

Omar E. Pol, Jun 26 2014

Keywords

• nonn
• more

Comments

Partial sums give A244360. - Omar E. Pol, Oct 18 2014

Crossrefs

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

Formula

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

a(n) = A244371(n)/8. - Omar E. Pol, Oct 18 2014

Extensions

a(13)-a(28) from Omar E. Pol, Oct 18 2014

a(29)-a(32) from Omar E. Pol, May 04 2023