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A261659 a(n) = sqrt(A261655(n)/144) for n>1. 1
1, 3, 5, 35, 33, 144, 80, 137, 285, 363, 387, 351, 204, 935, 225, 241, 289, 665, 1210, 310, 710, 324, 327, 685, 945, 749, 805, 479, 2091, 1260, 1169, 628, 2156, 654, 2355, 1827, 1545, 2181, 1499, 761, 3126, 1575, 2364, 1770, 1452, 1455, 2827, 1739, 3390, 4641 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
COMMENTS
The primes of the sequence are 3, 5, 137, 241, 479, 761, 1499, ...
The squares of the sequence are 1, 144, 225, 289, 324, ...
LINKS
EXAMPLE
a(3)=3 because sqrt(A261655(3)/144) = sqrt(1296/144) = sqrt(9)=3.
MAPLE
q:=83:for n from 2 to 10^7 do:p:=n^2+2:if isprime(p) then x:=p-q:q:=p: z:=sqrt(x):if z=floor(z) then printf(`%d, `, x/144):else fi:fi:od:
CROSSREFS
Cf. A261655: squares equal to the difference between two successive primes of the form k^2+2.
Sequence in context: A068111 A162444 A305858 * A346715 A259853 A052468
KEYWORD
nonn
AUTHOR
Michel Lagneau, Aug 28 2015
STATUS
approved

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)