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A000742 Number of compositions of n into 4 ordered relatively prime parts.
(Formerly M3381 N1362)
+0
2
1, 4, 10, 20, 34, 56, 80, 120, 154, 220, 266, 360, 420, 560, 614, 816, 884, 1120, 1210, 1540, 1572, 2020, 2080, 2544, 2638, 3276, 3200, 4060, 4040, 4840, 4896, 5960, 5710, 7140, 6954, 8216, 8136, 9880, 9244, 11480, 11010, 12824, 12650, 15180, 14024, 17276 (list; graph; listen)
OFFSET

3,2

REFERENCES

H. W. Gould, Binomial coefficients, the bracket function, and compositions with relatively prime summands, Fib. Quart. 2 (1964), 241-260.

LINKS

N. J. A. Sloane, Transforms

FORMULA

Moebius transform of C(n-1, 3).

CROSSREFS

Sequence in context: A047953 A008013 A024991 this_sequence A132152 A008234 A008114

Adjacent sequences: A000739 A000740 A000741 this_sequence A000743 A000744 A000745

KEYWORD

nonn

AUTHOR

njas

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Last modified August 29 16:58 EDT 2008. Contains 143238 sequences.


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