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A202148 Sum of rows of the triangle in A080381. 0
1, 2, 4, 8, 12, 32, 36, 100, 132, 392, 384, 1168, 1500, 5332, 5284, 15740, 16804, 60896, 62872, 222948, 243780, 927176, 876004, 2999432, 3284180, 12706832, 12636656, 45043700, 46679920, 176783132, 177597976, 652158968, 700632804, 2696835032, 2735898216 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..34.

EXAMPLE

a(0)= 1.

a(4)= 1 + 2 + 6 + 2 + 1 = 12.

MATHEMATICA

Table[Total[Table[GCD[Binomial[n, j], Binomial[n, Floor[n/2]]], {j, 0, n}]], {n, 0, 50}]

CROSSREFS

Cf. A080381.

Sequence in context: A076745 A007374 A105207 * A215825 A177268 A289085

Adjacent sequences:  A202145 A202146 A202147 * A202149 A202150 A202151

KEYWORD

nonn

AUTHOR

Jacques ALARDET, Dec 12 2011

STATUS

approved

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Last modified August 10 04:38 EDT 2020. Contains 336368 sequences. (Running on oeis4.)