A365277 - OEIS

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A365277

Numbers of the form prime(i)*prime(j)*prime(i+j).

12, 30, 63, 70, 154, 165, 273, 286, 325, 442, 561, 595, 646, 741, 874, 931, 1045, 1173, 1334, 1495, 1653, 1771, 1798, 2139, 2294, 2465, 2639, 2945, 3034, 3219, 3509, 3526, 3689, 3813, 4042, 4255, 4433, 4773, 4921, 4982, 5781, 5945, 6253, 6254, 6601, 6665, 6837, 6919, 7198, 8174, 8319, 8569, 8695

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OFFSET

1,1

COMMENTS

Members of A364462 that have no proper divisor in A364462.

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

EXAMPLE

a(3) = 63 is a term because 63 = 3^2 * 7 = prime(2) * prime(2) * prime(2+2).

MAPLE

N:= 10^4: # for terms <= N

S:= NULL:

for i from 1 do

p:= ithprime(i);

if 2*p^2 > N then break fi;

for j from 1 to i do

v:= p * ithprime(j)*ithprime(i+j);

if v > N then break fi;

S:= S, v

od:

sort([S]);

CROSSREFS

Intersection of A014612 and A364462.

Sequence in context: A323441 A064483 A375718 * A322181 A334791 A110019

Adjacent sequences: A365274 A365275 A365276 * A365278 A365279 A365280

KEYWORD

nonn

AUTHOR

Robert Israel, Aug 30 2023

STATUS

approved