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Search: id:A108623
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A108623 G.f. satisfies x = (A(x)-(A(x))^2)/(1-A(x)-(A(x))^2). +0
3
1, 0, -1, -1, 1, 4, 3, -8, -23, -10, 67, 153, 9, -586, -1081, 439, 5249, 7734, -7941, -47501, -53791, 105314, 430119, 343044, -1249799, -3866556, -1730017, 13996097, 34243897, 1947204, -150962373, -296101864, 121857185, 1582561870 (list; graph; listen)
OFFSET

1,6

COMMENT

Row sums of inverse of Riordan array (1/(1-x-x^2), x(1-x)/(1-x-x^2)) (Cf. A053538). - Paul Barry (pbarry(AT)wit.ie), Nov 01 2006

FORMULA

Binomial transform of A105523. - Paul Barry (pbarry(AT)wit.ie), Nov 01 2006

G.f.: (1+x-sqrt(1-2x+5x^2))/(2x(1-x)); - Paul Barry (pbarry(AT)wit.ie), Nov 01 2006

CROSSREFS

Cf. A039978. Except for signs, same as A108624.

Sequence in context: A165739 A137503 A108624 this_sequence A159550 A155536 A095303

Adjacent sequences: A108620 A108621 A108622 this_sequence A108624 A108625 A108626

KEYWORD

sign

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Jun 12 2005

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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