140919

Appears in sequences

• Shifts left 2 places under Stirling2 transform.at n=10A007469
• Divide natural numbers in groups with prime(n) elements and add together.at n=27A034957
• a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = -2, a(1) = -2, a(2) = 2, a(3) = 1.at n=21A295854