A335778 The square roots of the perfect squares produced by A335410 in the order in which they appear.
12, 12, 24, 36, 60, 84, 84, 132, 96, 372, 144, 408, 168, 180, 732, 468, 348, 1032, 408, 1392, 528, 1704, 612, 1956, 948, 744, 2316, 1092, 816, 1212, 1236, 2724, 912, 2616, 2820, 948, 1092, 1548, 1188, 1200, 1716
Offset: 1
Keywords
Examples
11 is in sequence A335410. 2*(11^2 - 7^2) = 144 = 12^2. Therefore, 12 is in this sequence.
Crossrefs
Cf. A335410.
Programs
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Mathematica
Select[IntegerQ][Table[Sqrt[2*Prime[n]^2 - 2*Prime[n-1]^2], {n,17000}]] -
PARI
lista(nn) = {my(pp=2, s); forprime (p=3, nn, if (issquare(s=2*(p^2 - pp^2)), print1(sqrtint(s), ", ")); pp = p;);} \\ Michel Marcus, Jun 25 2020