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A035031 For n >= 6, max( prevprime(n), 2*prevprime(floor((n-1)/2))). 1
1, 2, 2, 3, 3, 5, 5, 7, 7, 7, 7, 11, 11, 13, 13, 13, 14, 17, 17, 19, 19, 19, 19, 23, 23, 23, 23, 23, 26, 29, 29, 31, 31, 31, 31, 31, 34, 37, 37, 37, 38, 41, 41, 43, 43, 43, 43, 47, 47, 47, 47, 47, 47, 53, 53, 53, 53, 53 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

S. K. Stein and S. Szabo, Algebra and Tiling, MAA Carus Monograph 25, 1994, page 104.

LINKS

Table of n, a(n) for n=1..58.

CROSSREFS

Cf. A035032.

Sequence in context: A179254 A304430 A086609 * A035032 A121260 A121261

Adjacent sequences:  A035028 A035029 A035030 * A035032 A035033 A035034

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 6 11:38 EDT 2020. Contains 333273 sequences. (Running on oeis4.)