A177692 The even values of PrimePi(.), with repetition.

0, 2, 2, 4, 4, 4, 4, 6, 6, 6, 6, 8, 8, 8, 8, 10, 10, 12, 12, 12, 12, 14, 14, 14, 14, 16, 16, 16, 16, 16, 16, 18, 18, 18, 18, 18, 18, 20, 20, 22, 22, 22, 22, 24, 24, 24, 24, 24, 24, 24, 24, 26, 26, 28, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 32, 32, 32, 32, 32

Offset: 1

Author

Giovanni Teofilatto, May 11 2010

Keywords

• nonn
• easy

Crossrefs

Cf. A000720, A005843.

Formula

Obtained by removing all odd numbers from A000720. Block lengths (frequencies of repetitions) are in A088680.

Extensions

Erroneous formula removed by R. J. Mathar, May 14 2010