A244360 Total number of toothpicks after 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, 3, 6, 10, 14, 20, 25, 33, 41, 51, 58, 70, 78, 91, 104, 120, 130, 148, 159, 179, 197, 216, 229, 253, 270, 292, 314, 342

Offset: 1

Author

Omar E. Pol, Jun 26 2014

Keywords

• nonn
• more

Comments

Partial sums of A244361.

Crossrefs

Cf. A000203, A237270, A237271, A237593, A244361, A244362, A244363, A244370, A244371.

Formula

a(n) = A244362(n)/2 = A244370(n)/8. - Omar E. Pol, Oct 18 2014

Extensions

More terms from Omar E. Pol, Oct 18 2014