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A002292 Related to representation as sums of squares.
(Formerly M5085 N2201)
2
1, 20, 74, 24, 157, 124, 478, 1480, 1198, 3044, 480, 184, 2351, 1720, 3282, 5728, 2480, 1776, 10326, 9560, 8886, 9188, 11618, 23664, 16231, 23960 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

This is A225923 without the minus signs. - Michael Somos, Aug 09 2018

REFERENCES

J. W. L. Glaisher, On the representation of a number as sum of 2,4,6,8... squares, Quart. J. Math. 38 (1907), 1-62 (see p. 56).

Masao Koike, Modular forms on non-compact arithmetic triangle groups, preprint.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=0..25.

FORMULA

a(n) = abs(A225923(n)). - Michael Somos, Aug 09 2018

CROSSREFS

Cf. A225923.

Sequence in context: A263969 A139241 A139232 * A225923 A238026 A010008

Adjacent sequences:  A002289 A002290 A002291 * A002293 A002294 A002295

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified December 19 10:10 EST 2018. Contains 318246 sequences. (Running on oeis4.)