The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A112603 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A112603

Number of representations of n as the sum of a square and a triangular number.
(history; published version)

#26 by Charles R Greathouse IV at Fri Mar 12 22:24:43 EST 2021

LINKS

M. Michael Somos, <a href="/A010815/a010815.txt">Introduction to Ramanujan theta functions</a>

Discussion

Fri Mar 12

22:24

OEIS Server: https://oeis.org/edit/global/2897

#25 by N. J. A. Sloane at Wed Nov 13 21:54:13 EST 2019

LINKS

M. Somos, <a href="http://cis.csuohio.edu/~somosA010815/multiqa010815.pdftxt">Introduction to Ramanujan theta functions</a>

Discussion

Wed Nov 13

21:54

OEIS Server: https://oeis.org/edit/global/2830

#24 by Susanna Cuyler at Fri Dec 01 18:59:24 EST 2017

STATUS

proposed

approved

#23 by G. C. Greubel at Fri Dec 01 13:21:15 EST 2017

STATUS

editing

proposed

#22 by G. C. Greubel at Fri Dec 01 13:20:59 EST 2017

LINKS

G. C. Greubel, <a href="/A112603/b112603.txt">Table of n, a(n) for n = 0..5000</a>

STATUS

approved

editing

#21 by Alois P. Heinz at Sun Dec 06 11:00:54 EST 2015

STATUS

reviewed

approved

#20 by Vaclav Kotesovec at Sun Dec 06 10:08:31 EST 2015

STATUS

proposed

reviewed

#19 by Jon E. Schoenfield at Sun Dec 06 09:34:45 EST 2015

STATUS

editing

proposed

#18 by Jon E. Schoenfield at Sun Dec 06 09:34:41 EST 2015

NAME

Number of representations of n as a the sum of a square and a triangular number.

FORMULA

G.f. is a period 1 Fourier series which satisfies f(-1 / (32 t)) = 2^(1/2) (t/i) g(t) where q = exp(2 pi Pi i t) and g() is g.f. for A139093. - Michael Somos, Mar 16 2011

STATUS

proposed

editing

#17 by Jean-François Alcover at Sun Dec 06 09:20:23 EST 2015

STATUS

editing

proposed