OFFSET
1,3
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..10000
EXAMPLE
Triangle begins:
1
0, 2, 0
0, 0, 3, 0, 0
0, 0, 3, 4, 5, 0, 0
0, 0, 3, 0, 5, 0, 7, 0, 0
0, 0, 0, 0, 5, 6, 7, 0, 0, 0, 0
0, 0, 3, 0, 0, 0, 7, 0, 0, 0,11, 0, 0
0, 0, 3, 0, 5, 0, 0, 8, 0, 0,11, 0,13, 0, 0
0, 0, 0, 0, 5, 0, 7, 0, 9, 0,11, 0,13, 0, 0, 0, 0
0, 0, 3, 0, 0, 0, 7, 0, 0,10, 0, 0,13, 0, 0, 0,17, 0, 0
MAPLE
for n from 1 to 10 do for k from 1 to 2*n-1 do if(k=n or (isprime(k) and isprime(2*n-k)))then print(k):else print(0):fi:od:od: # Nathaniel Johnston, Apr 18 2011
CROSSREFS
KEYWORD
easy,nonn,tabf
AUTHOR
Omar E. Pol, Jan 14 2009
STATUS
approved