A338537 Numbers that occur more than once in A338529.

4320, 23142, 301310, 333414, 340352, 375650, 553520, 644490, 910872, 921730, 1133670, 1366090, 1422650, 1440138, 1650350, 1705070, 1751970, 1874430, 2091850, 2180768, 2852640, 3213780, 3438548, 3676320, 4044732, 4444662, 4682000, 4854274, 4863754, 5101914, 5384106, 6011250, 6309860, 6551688

Offset

1,1

Comments

Does any number occur more than twice in A338529?

Links

Robert Israel, Table of n, a(n) for n = 1..609

Example

a(3) = 301310 is in the sequence because A338529(1618) = A338529(2414) = 301310.

Maple

A338529:= [seq(ithprime(n+2)*ithprime(n+3)-ithprime(n)*ithprime(n+1), n=1..100000)]):
M:= 12*ithprime(100000):
V:= Vector(M, datatype=integer[4]):
R:= NULL:
for i from 1 to 100000 do
  v:= A338529[i];
  if v <= M then V[v]:= V[v]+1; if V[v] > 1 then R:= R, v fi fi
od:
sort([R]);

Crossrefs

Cf. A338529.

Sequence in context: A190929 A055153 A190011 * A145312 A008409 A320729

Adjacent sequences: A338534 A338535 A338536 * A338538 A338539 A338540

Keyword

nonn

Author

J. M. Bergot and Robert Israel, Nov 01 2020

Status

approved