The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A290147 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A290147

Expansion of (1-sqrt(1-8*x-8*x^2))/(4*x).
(history; published version)

#16 by N. J. A. Sloane at Thu Jan 30 22:10:10 EST 2020

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editing

approved

#15 by N. J. A. Sloane at Thu Jan 30 22:10:08 EST 2020

FORMULA

D-finite with recurrence (n+1)*a(n) +4*(-2*n+1)*a(n-1) +8*(-n+2)*a(n-2)=0. - R. J. Mathar, Jul 21 2017

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approved

editing

#14 by R. J. Mathar at Sat Jan 25 08:53:11 EST 2020

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approved

#13 by R. J. Mathar at Sat Jan 25 08:53:09 EST 2020

FORMULA

D-finite (n+1)*a(n) +4*(-2*n+1)*a(n-1) +8*(-n+2)*a(n-2)=0. - R. J. Mathar, Jul 21 2017

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#12 by Harvey P. Dale at Sat Feb 10 14:11:38 EST 2018

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approved

#11 by Harvey P. Dale at Sat Feb 10 14:11:33 EST 2018

MATHEMATICA

CoefficientList[Series[(1-Sqrt[1-8x-8x^2])/(4x), {x, 0, 30}], x] (* Harvey P. Dale, Feb 10 2018 *)

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approved

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#10 by Bruno Berselli at Sat Jul 22 09:23:28 EDT 2017

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proposed

approved

#9 by Altug Alkan at Sat Jul 22 04:04:12 EDT 2017

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proposed

#8 by Altug Alkan at Sat Jul 22 04:03:20 EDT 2017

PROG

(PARI) x='x+O('x^99); Vec((1-sqrt(1-8*x-8*x^2))/(4*x)) \\ Altug Alkan, Jul 22 2017

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editing

#7 by Robert Israel at Fri Jul 21 20:31:58 EDT 2017

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proposed