A203124 - OEIS

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A203124

Smallest integer m such that each sum of m plus the square of an even number up to 2n is an odd composite numbers.

5, 5, 29, 29, 29, 41, 41, 41, 41, 41, 41, 341, 341, 341, 341, 341, 341, 479, 479, 479, 749, 749, 749, 749, 749, 749, 749, 749, 749, 3461, 3461, 3461, 3561, 3561, 3701, 3701, 3701, 3701, 3701, 3701, 3701, 3701, 3701, 3701, 6041, 6041, 6041, 6041, 6041, 6041

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..50.

EXAMPLE

a(1)=5 because 2^2+{1,3} are prime and 2^2+5 is composite;

a(2)=5 because the least m such that all {2^2,4^2}+m are all odd composite is 5;

a(3)=29 because the least m such that all {2^2,4^2,6^2}+m are all odd composite is 29.

CROSSREFS

Sequence in context: A219351 A130220 A081847 * A305180 A284140 A284182

Adjacent sequences: A203121 A203122 A203123 * A203125 A203126 A203127

KEYWORD

nonn

AUTHOR

Zak Seidov, Dec 29 2011

STATUS

approved