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A071301 Denominators of a(n+1) = Sum_{k=0..n} a'((n^2-k^2)/n), where a(0) = a(1) = 1; and a'(x) = a(x) if x is an integer and is linearly interpolated otherwise. 1
1, 1, 1, 2, 6, 3, 15, 60, 70, 140, 540, 37800, 8316, 207900, 1351350, 75675600, 141891750, 11176704, 308756448000, 222304642560, 15084957888000, 234654900480000, 1267136462592000, 139385010885120000, 213723683357184000 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

EXAMPLE

a(4) = a'(9/3)+a'(8/3)+a'(5/3)+a'(0/3) =

a(3)+[(1/3)a(2)+(2/3)a(3)]+[(1/3)a(1)+(2/3)a(2)]+a(0)=65/6.

CROSSREFS

Cf. A071298, A071299, A071300.

Sequence in context: A094299 A121566 A056839 * A145642 A056195 A083169

Adjacent sequences:  A071298 A071299 A071300 * A071302 A071303 A071304

KEYWORD

nonn,easy,frac

AUTHOR

Michele Dondi (blazar(AT)lcm.mi.infn.it), Jun 10 2002

EXTENSIONS

More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Nov 08 2005

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.