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A075614 Let P(k,X)=4^k*prod(i=1,k,X-cos(Pi*i/k)) (which is a polynomial with integer coefficients). Sequence gives maximum values of coefficients of P(n,X). 0
4, 16, 64, 256, 1024, 4096, 20480, 98304, 458752, 2097152, 9437184, 41943040, 188743680, 922746880, 4429185024, 20937965568, 97710505984, 450971566080, 2061584302080, 9620726743040, 46729244180480, 224300372066304 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

P(3,X)=64*X^3 + 64*X^2 - 16*X -16 hence a(3)=64

CROSSREFS

Sequence in context: A000302 A262710 A050734 * A083592 A069029 A238940

Adjacent sequences:  A075611 A075612 A075613 * A075615 A075616 A075617

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Oct 11 2002

STATUS

approved

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Last modified February 20 02:47 EST 2018. Contains 299357 sequences. (Running on oeis4.)