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A023031 Number of compositions of n into 6 ordered relatively prime parts. 4
1, 6, 21, 56, 126, 252, 461, 792, 1281, 2002, 2982, 4368, 6131, 8568, 11502, 15498, 20097, 26334, 33166, 42504, 52338, 65724, 79443, 98280, 116626, 142506, 166908, 201124, 232968, 278250, 317983, 376992, 427329, 501150, 564108, 658008, 732612 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

Table of n, a(n) for n=6..42.

N. J. A. Sloane, Transforms

FORMULA

Moebius transform of C(n-1, 5)

CROSSREFS

Sequence in context: A108907 A120478 A008488 * A090581 A000389 A143980

Adjacent sequences:  A023028 A023029 A023030 * A023032 A023033 A023034

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified February 24 14:41 EST 2018. Contains 299623 sequences. (Running on oeis4.)