162970

Appears in sequences

• a(n) = Sum{a(k): k=0,1,2,...,n-4,n-2,n-1}; a(n-3) is not a summand; initial terms are 1,2,2.at n=20A049868
• a(n) = Sum_{i=1..n} prime(n*(i - 1) + i).at n=34A319012