The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A270784 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A270784

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

#22 by Joerg Arndt at Fri Mar 25 08:23:35 EDT 2016

STATUS

editing

proposed

#21 by Joerg Arndt at Fri Mar 25 08:23:31 EDT 2016

NAME

Expansion of (1-sqrt(1-4*x^4/(1-x)^4))/(2*x^4*(1-x)).

FORMULA

G.f.: 1/(1-x)*(1-sqrt(1-4*x^4/(1-x)^4))/(2*x^4*(1-x)).

#20 by Joerg Arndt at Fri Mar 25 08:22:25 EDT 2016

PROG

(PARI) x='x+O('x^20044); Vec((1-sqrt(1-4*x^4/(1-x)^4))/(2*x^4*(1-x))) \\ Altug Alkan, Mar 23 2016

STATUS

proposed

editing

#19 by Altug Alkan at Fri Mar 25 07:59:56 EDT 2016

STATUS

editing

proposed

#18 by Altug Alkan at Fri Mar 25 07:58:55 EDT 2016

PROG

(PARI) x='x+O('x^200); Vec(1/(1-x)*(1-sqrt(1-4*x^4/(1-x)^4))/(2*x^4*(1-x))) \\ Altug Alkan, Mar 23 2016

STATUS

proposed

editing

#17 by N. J. A. Sloane at Fri Mar 25 07:15:12 EDT 2016

STATUS

editing

proposed

#16 by N. J. A. Sloane at Fri Mar 25 07:14:15 EDT 2016

NAME

Expansion of (1/(1-x))* (1-sqrt(1-4*x^4/(1-x)^4))/(2*x^4*(1-x)).

STATUS

approved

editing

Discussion

Fri Mar 25

07:15

N. J. A. Sloane: I mafe a suggestion, but then I hit "approve" by accident. So I went back and made the change that I suggested. Hope you approve.

#15 by N. J. A. Sloane at Fri Mar 25 07:12:03 EDT 2016

STATUS

editing

approved

#14 by N. J. A. Sloane at Fri Mar 25 07:10:24 EDT 2016

NAME

Expansion of (1/(1-x))*(1-sqrt(1-4*x^4/(1-x)^4))/(2*x^4).

STATUS

proposed

editing

Discussion

Fri Mar 25

07:12

N. J. A. Sloane: How about rearranging the gf so that it says (1-sqrt(1-4*x^4/(1-x)^4))/(2*x^4*(1-x)) ? That would be less ambiguous

#13 by Michael De Vlieger at Wed Mar 23 07:10:38 EDT 2016

STATUS

editing

proposed