A104196 Sum of CarmichaelLambda[n] between successive powers of 2.

1, 3, 14, 46, 206, 694, 2610, 9420, 35038, 130784, 484136, 1827996, 6891816, 26121822, 99232238, 379021972, 1450654796, 5564804616, 21406426134, 82457456808

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Formula

a(n)=Sum[CarmichaelLambda[i], {i, 2^n, 2^(n + 1) - 1}]

Mathematica

a= Table[Sum[CarmichaelLambda[i], {i, 2^n, 2^(n + 1) - 1}], {n, 0, 24}]

Crossrefs

Sequence in context: A123350 A027953 A264501 * A281869 A202144 A287426

Adjacent sequences: A104193 A104194 A104195 * A104197 A104198 A104199

Keyword

nonn,less

Author

Roger L. Bagula, Mar 12 2005

Status

approved