login
A135557
Consider the primes which are congruent to 2 or 3 modulo 5. List the sum of any consecutive pair if that sum is congruent to 0 modulo 10.
2
10, 20, 30, 40, 60, 80, 90, 100, 120, 140, 180, 200, 210, 220, 240, 320, 330, 340, 390, 420, 450, 460, 490, 520, 540, 560, 600, 620, 630, 700, 720, 740, 780, 830, 900, 920, 930, 990, 1070, 1120, 1140, 1180, 1200, 1220, 1230, 1260, 1290, 1300, 1350, 1360
OFFSET
1,1
LINKS
EXAMPLE
3+7 == 10; 13+17 == 30; 17+23 == 40; 23+37 == 60; 37+43 == 80;...
MATHEMATICA
Select[ Plus @@@ Partition[ Select[ Prime@ # & /@ Range@125, Mod[ #, 5] == 2 || Mod[ #, 5] == 3 &], 2, 1], Mod[ #, 10] == 0 &] (* Robert G. Wilson v, Feb 29 2008 *)
CROSSREFS
Sequence in context: A044835 A033007 A127993 * A093037 A355695 A273016
KEYWORD
easy,nonn
AUTHOR
Daniele Corradetti (d.corradetti(AT)gmail.com), Feb 28 2008
EXTENSIONS
Edited, corrected and extended by Robert G. Wilson v, Feb 29 2008
STATUS
approved