A076625 - OEIS

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A076625

Maximum of the absolute values of the coefficients of P(n,x) where P(n,x) = 4^(n-1)*Product_{k=0..n} (x - cos(k*Pi/n)^2).

2, 8, 40, 208, 1200, 6528, 34048, 196608, 1112064, 6062080, 33701888, 194871296, 1091371008, 5950930944, 34801188864, 198474465280, 1105056497664, 6298980581376, 36394596564992, 205774030635008, 1151529050439680

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

p(3,x) = 16*x^4 - 40*x^3 + 33*x^2 -10*x + 1, hence a(3)=40.

CROSSREFS

Sequence in context: A187071 A154626 A003305 * A139415 A119817 A025570

Adjacent sequences: A076622 A076623 A076624 * A076626 A076627 A076628

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Oct 22 2002

STATUS

approved