The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A236922 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A236922

Number of integer solutions to a^2 + b^2 + 4*c^2 + 4*d^2 = n.
(history; published version)

#19 by Vaclav Kotesovec at Sat Oct 06 09:29:40 EDT 2018

STATUS

proposed

approved

#18 by Seiichi Manyama at Sat Oct 06 08:52:03 EDT 2018

STATUS

editing

proposed

#17 by Seiichi Manyama at Sat Oct 06 08:52:00 EDT 2018

LINKS

Seiichi Manyama, <a href="/A236922/b236922.txt">Table of n, a(n) for n = 0..10000</a>

STATUS

approved

editing

#16 by Susanna Cuyler at Fri Aug 03 08:17:45 EDT 2018

STATUS

proposed

approved

#15 by Ilya Gutkovskiy at Fri Aug 03 05:40:23 EDT 2018

STATUS

editing

proposed

#14 by Ilya Gutkovskiy at Fri Aug 03 05:28:39 EDT 2018

FORMULA

G.f.: theta_3(q)^2*theta_3(q^4)^2, where theta_3() is the Jacobi theta function. - Ilya Gutkovskiy, Aug 03 2018

STATUS

approved

editing

#13 by Bruno Berselli at Fri May 25 04:39:39 EDT 2018

STATUS

reviewed

approved

#12 by Joerg Arndt at Fri May 25 04:39:34 EDT 2018

STATUS

proposed

reviewed

#11 by Michel Marcus at Fri May 25 04:34:38 EDT 2018

STATUS

editing

proposed

#10 by Michel Marcus at Fri May 25 04:34:34 EDT 2018

REFERENCES

Yao, Olivia X. M.; Xia, Ernest X. W. Combinatorial proofs of five formulas of Liouville. Discrete Math. 318 (2014), 1--9. MR3141622.

LINKS

Olivia X. M. Yao, Ernest X. W. Xia, <a href="https://doi.org/10.1016/j.disc.2013.11.011">Combinatorial proofs of five formulas of Liouville</a>, Discrete Math. 318 (2014), 1--9. MR3141622.

STATUS

approved

editing