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A101268 Number of compositions of n into pairwise relatively prime parts. 10
1, 1, 2, 4, 7, 13, 22, 38, 63, 101, 160, 254, 403, 635, 984, 1492, 2225, 3281, 4814, 7044, 10271, 14889, 21416, 30586, 43401, 61205, 85748, 119296, 164835, 226423, 309664, 422302, 574827, 781237, 1060182, 1436368, 1942589, 2622079, 3531152, 4742316, 6348411 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..400

Temba Shonhiwa, Compositions with pairwise relatively prime summands within a restricted setting, Fibonacci Quart. 44 (2006), no. 4, 316-323.

FORMULA

It seems that no formula is known.

CROSSREFS

Cf. A051424, A000740.

Row sums of A282748.

Sequence in context: A151897 A192758 A085489 * A188920 A281362 A319111

Adjacent sequences:  A101265 A101266 A101267 * A101269 A101270 A101271

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Dec 18 2004

EXTENSIONS

a(0)=1 prepended by Alois P. Heinz, Jun 14 2017

STATUS

approved

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Last modified January 17 09:32 EST 2020. Contains 330949 sequences. (Running on oeis4.)