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A088675 Eigenfunction of a sequence transformation. 0
0, 1, -2, 8, -36, 160, -656, 2368, -7664, 29440, -184896, 1174272, -3395200, -21222400, 178961920, 1638189056, -27449296640, -28875071488, 3234263731200, -10138343231488, -422012179953664, 3426627065331712, 59293997091528704 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

G.f. A(x) satisfies x=(1+4*A(x))A(A(x)).

PROG

(PARI) a(n)=local(A); if(n<1, 0, A=x; for(k=1, n, A=Pol(A+serreverse(A+x*O(x^k))/(1+4*x))/2); polcoeff(A, n))

CROSSREFS

Sequence in context: A203762 A076122 A123290 * A027743 A152124 A147722

Adjacent sequences:  A088672 A088673 A088674 * A088676 A088677 A088678

KEYWORD

sign

AUTHOR

Michael Somos, Oct 04 2003

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Last modified February 17 08:44 EST 2012. Contains 205998 sequences.