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A026392 T(n,[ n/2 ]), where T is the array in A026386. 4
1, 2, 4, 8, 17, 34, 75, 150, 339, 678, 1558, 3116, 7247, 14494, 34016, 68032, 160795, 321590, 764388, 1528776, 3650571, 7301142, 17501619, 35003238, 84179877, 168359754, 406020930, 812041860, 1963073865, 3926147730 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..30.

FORMULA

Conjecture: (n+1)*a(n) +2*(n-1)*a(n-1) +2*(-3*n+1)*a(n-2) +4*(-3*n+7)*a(n-3) +5*(n-3)*a(n-4) +10*(n-5)*a(n-5)=0. - R. J. Mathar, Feb 10 2015

MAPLE

A026392 := proc(n)

    A026386(n, floor(n/2)) ;

end proc: # R. J. Mathar, Feb 10 2015

CROSSREFS

Cf. A026378, A085362.

Sequence in context: A018093 A214083 A026743 * A266897 A018094 A293331

Adjacent sequences:  A026389 A026390 A026391 * A026393 A026394 A026395

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

Offset corrected. R. J. Mathar, Feb 10 2015

STATUS

approved

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Last modified February 22 23:32 EST 2018. Contains 299472 sequences. (Running on oeis4.)