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A244363 Number of toothpicks added at n-th 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 (list; graph; refs; listen; history; text; internal format)
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 A333557

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

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Last modified August 13 00:27 EDT 2020. Contains 336441 sequences. (Running on oeis4.)