A090350 a(n) = Floor[(n-PrimePi[n])/(2-PrimePi[n]+PrimePi[n-1])]

0, 1, 1, 1, 2, 1, 3, 2, 2, 3, 6, 3, 7, 4, 4, 5, 10, 5, 11, 6, 6, 7, 14, 7, 8, 8, 9, 9, 19, 10, 20, 10, 11, 11, 12, 12, 25, 13, 13, 14, 28, 14, 29, 15, 15, 16, 32, 16, 17, 17, 18, 18, 37, 19, 19, 20, 20, 21, 42, 21, 43, 22, 22, 23, 23, 24, 48, 24, 25, 25, 51, 26, 52, 26, 27, 27, 28, 28

Offset

1,5

Comments

Composite information as a projection with the Composite distribution.

CompositeInformation[n]=1-PrimePi[n]+PrimePi[n-1]) set is from -> {0,1}

Links

Table of n, a(n) for n=1..78.

Mathematica

digits=200 f[n_]=Floor[(n-PrimePi[n])/(2-PrimePi[n]+PrimePi[n-1])] a=Table[f[n], {n, 1, digits}]

Crossrefs

Sequence in context: A103981 A029270 A364503 * A199133 A199246 A367858

Adjacent sequences: A090347 A090348 A090349 * A090351 A090352 A090353

Keyword

nonn

Author

Roger L. Bagula, Jan 29 2004

Status

approved