OFFSET
1,2
COMMENTS
Also, row sums of triangle in A154726.
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = A154786(n) + n.
MAPLE
for n from 1 to 50 do rsum:=0: for k from 1 to 2*n-1 do if(k=n or (isprime(k) and isprime(2*n-k)))then rsum:=rsum+k:fi:od: printf("%d, ", rsum):od: # Nathaniel Johnston, Apr 19 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Jan 15 2009
EXTENSIONS
a(11)-a(50) from Nathaniel Johnston, Apr 19 2011
STATUS
approved