

A244363


Number of toothpicks added at nth stage in the toothpick structure of the symmetric representation of sigma in the first quadrant (without the axis x and y).


10



2, 4, 6, 8, 8, 12, 10, 16, 16, 20, 14, 24, 16, 26, 26, 32, 20, 36, 22, 40, 36, 38, 26, 48, 34, 44, 44, 56
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OFFSET

1,1


COMMENTS

Partial sums give A244362.  Omar E. Pol, Oct 18 2014
a(n) is also the sum of semiperimeters of the parts of the symmetric representation of sigma(n).  Omar E. Pol, Dec 11 2016


LINKS

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


FORMULA

a(n) = 2*A244361(n).
a(n) = A244371(n)/4.  Omar E. Pol, Oct 18 2014
a(n) = A274919(n)/2.  Omar E. Pol, Dec 11 2016


CROSSREFS

Cf. A000203, A196020, A237270, A237271, A237593, A244360, A244361, A244362, A244370, A244371, A245092, A262626, A274919.
Sequence in context: A115158 A107634 A060659 * A063199 A219028 A062355
Adjacent sequences: A244360 A244361 A244362 * A244364 A244365 A244366


KEYWORD

nonn,more


AUTHOR

Omar E. Pol, Jun 26 2014


EXTENSIONS

More terms from Omar E. Pol, Oct 18 2014


STATUS

approved



