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

1,2

Comments

Partial sums of A244361.

Links

Table of n, a(n) for n=1..28.

Formula

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

Crossrefs

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

Sequence in context: A334454 A236758 A272058 * A183863 A372637 A140949

Adjacent sequences: A244357 A244358 A244359 * A244361 A244362 A244363

Keyword

nonn,more

Author

Omar E. Pol, Jun 26 2014

Extensions

More terms from Omar E. Pol, Oct 18 2014

Status

approved