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A020682 Numbers of form 4 x^2 + 5 y^2. 0
0, 4, 5, 9, 16, 20, 21, 24, 36, 41, 45, 49, 56, 61, 64, 69, 80, 81, 84, 96, 100, 105, 109, 116, 120, 125, 129, 141, 144, 145, 149, 161, 164, 180, 184, 189, 196, 201, 216, 224, 225, 241, 244, 245, 249, 256, 261, 269, 276, 280, 281, 301, 309, 320, 321, 324, 329, 336, 344, 345 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..60.

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

CROSSREFS

Sequence in context: A138673 A087948 A010437 * A243702 A155565 A278336

Adjacent sequences:  A020679 A020680 A020681 * A020683 A020684 A020685

KEYWORD

easy,nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified July 30 17:21 EDT 2021. Contains 346359 sequences. (Running on oeis4.)