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A002347 Consider all primes of form p = (x^2 + 11y^2 )/4; sequence gives values of y.
(Formerly M0151 N0061)
2
1, 1, 2, 1, 3, 3, 2, 4, 1, 3, 5, 5, 3, 6, 1, 7, 3, 6, 5, 3, 7, 6, 9, 9, 5, 8, 4, 10, 9, 7, 3, 11, 3, 9, 1, 11, 12, 8, 10, 12, 9, 11, 5, 9, 13, 3, 6, 1, 13, 3, 2, 10, 8, 15, 15, 7, 9, 13, 1, 15, 14, 15, 15, 5, 3, 15, 12, 4, 17, 9, 15, 11, 15, 14, 5, 6, 18, 2, 16, 7, 13, 17, 11, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
REFERENCES
A. J. C. Cunningham, Quadratic Partitions. Hodgson, London, 1904, p. 1.
D. H. Lehmer, Guide to Tables in the Theory of Numbers. Bulletin No. 105, National Research Council, Washington, DC, 1941, p. 55.
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
A. J. C. Cunningham, Quadratic Partitions, Hodgson, London, 1904 [Annotated scans of selected pages]
CROSSREFS
Sequence in context: A123143 A128133 A032434 * A006642 A332435 A361744
KEYWORD
nonn
AUTHOR
EXTENSIONS
Offset corrected by Mohammed Yaseen, Jul 24 2023
STATUS
approved

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Last modified March 28 17:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)