A182643 A182642(n) - A107857(n-1) for n>=1.

0, 1, 4, 6, 18, 31, 82, 132, 348, 565, 1480, 2394, 6270, 10147, 26566, 42984, 112536, 182089, 476716, 771342, 2019402, 3267463, 8554330, 13841196, 36236725, 58632253, 153501232, 248370211, 650241655

Offset

1,3

Comments

A182643(n) = distance from A107857(n-1) to A182642(n), where A182642(n) is the result of removing all but the outermost floor function in the formula for A107857 - so that n-1 floors are removed and the n-th remains.

Links

Table of n, a(n) for n=1..29.

Example

a(3)=floor(s*r*s)-floor(s*floor(r*floor(s))), where
r=(1+sqrt(5))/2 and s=r+1.

Crossrefs

Cf. A107857,A182642.

Sequence in context: A138276 A287682 A209236 * A156096 A281861 A218898

Adjacent sequences: A182640 A182641 A182642 * A182644 A182645 A182646

Keyword

nonn

Author

Clark Kimberling, Nov 24 2010

Status

approved