The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A233348 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A233348

Numbers n such that 3*n+2 and 3*n-2 are both prime for n multiple of 5 (A008587).
(history; published version)

#9 by T. D. Noe at Mon Dec 09 13:05:35 EST 2013

STATUS

editing

approved

#8 by T. D. Noe at Mon Dec 09 13:05:31 EST 2013

DATA

5, 15, 35, 55, 65, 75, 105, 155, 205, 215, 225, 275, 285, 295, 365, 405, 435, 475, 495, 555, 565, 595, 625, 665, 695, 735, 765, 825, 895, 945, 985, 1055, 1085, 1115, 1155, 1205, 1225, 1265, 1315, 1335, 1385, 1505, 1595, 1605, 1645, 1745, 1805, 1835, 1885, 1975, 2015, 2245, 2275, 2415, 2525

STATUS

approved

editing

#7 by T. D. Noe at Mon Dec 09 13:05:06 EST 2013

STATUS

editing

approved

#6 by T. D. Noe at Mon Dec 09 13:05:00 EST 2013

FORMULA

Intersection of A008587 and A157834.

MATHEMATICA

Select[5*Range[500], PrimeQ[3 # + 2] && PrimeQ[3 # - 2] &] (* T. D. Noe, Dec 09 2013 *)

CROSSREFS

Intersection of A008587 and Cf. A157834 (n such that 3n-2 and 3n+2 are both prime).

STATUS

proposed

editing

#5 by Michel Marcus at Sun Dec 08 01:48:33 EST 2013

STATUS

editing

proposed

#4 by Michel Marcus at Sun Dec 08 01:48:24 EST 2013

NAME

Numbers n such that 3*n+2 and 3*n-2 are both prime for n= multiple of 5 (A008587).

OFFSET

5,1,1

EXAMPLE

For n=15; 3*15+2=47 and 3*15-2=43.

PROG

(TI-BASIC) Clrio:5(sto)n:Lbl colorin:if isPrime(3n+2) and isPrime(3n-2) Then:Disp n:Pause: EndIf:n+5(sto)n:Goto colorin:EndPrgm

EndIf:n+5(sto)n:Goto colorin:EndPrgm

TI-BASIC

CROSSREFS

Intersection of A008587 and A157834.

KEYWORD

nonn,less,changed

STATUS

proposed

editing

#3 by César Aguilera at Sat Dec 07 21:56:48 EST 2013

STATUS

editing

proposed

#2 by César Aguilera at Sat Dec 07 21:54:25 EST 2013

NAME

allocated for César Aguilera

Numbers n such that 3*n+2 and 3*n-2 are both prime for n= A008587

DATA

OFFSET

5,1

EXAMPLE

For n=15; 3*15+2=47 and 3*15-2=43

PROG

Clrio:5(sto)n:Lbl colorin:if isPrime(3n+2) and isPrime(3n-2) Then:Disp n:Pause:

EndIf:n+5(sto)n:Goto colorin:EndPrgm

TI-BASIC

KEYWORD

allocated

nonn

AUTHOR

César Aguilera, Dec 07 2013

STATUS

approved

editing

#1 by César Aguilera at Sat Dec 07 21:54:25 EST 2013

NAME

allocated for César Aguilera

KEYWORD

allocated

STATUS

approved