311032

Appears in sequences

• 1000000n+1, 1000000n+3, 1000000n+7, 1000000n+9 are all primes.at n=24A064965
• "Self-Lucas"; a(n) is the sum of the last 5 terms. Sequence starts with 12,21,3,1,19 which are l,u,c,a,s if you consider a=1, b=2, c=3, ..., z=26.at n=18A129939