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A096384 a(n) is the area of the triangle with sides prime(n), prime(n+2) and prime(n+4), rounded down to the nearest integer. 1
28, 88, 95, 192, 272, 353, 528, 626, 788, 958, 1115, 1353, 1573, 1862, 2071, 2333, 2675, 2946, 3373, 3765, 4173, 4562, 4926, 5383, 5782, 6524, 6909, 8099, 8437, 9355, 9747, 10692, 11306, 12066, 12789, 13748, 14306, 15396, 15725, 17169, 17966, 19202 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

COMMENTS

The area of a prime sided triangle is always an irrational number.

LINKS

Andrew Howroyd, Table of n, a(n) for n = 4..1000

PROG

(PARI) \\ here areasquared is square of area of triangle with given sides.

areasquared(a, b, c)={my(p=(a+b+c)/2); p*(p-a)*(p-b)*(p-c)}

a(n)={sqrtint(floor(areasquared(prime(n), prime(n+2), prime(n+4))))} \\ Andrew Howroyd, Aug 17 2018

CROSSREFS

Cf. A007531.

Sequence in context: A042544 A042546 A164689 * A065655 A272399 A113958

Adjacent sequences:  A096381 A096382 A096383 * A096385 A096386 A096387

KEYWORD

nonn

AUTHOR

Cino Hilliard, Aug 05 2004

EXTENSIONS

Name clarified, a(4) prepended and data corrected by Andrew Howroyd, Aug 17 2018

STATUS

approved

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Last modified October 16 05:35 EDT 2019. Contains 328044 sequences. (Running on oeis4.)