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A050341 Number of factorizations with 3 levels of parentheses indexed by prime signatures. A050340(A025487). 3
1, 1, 5, 5, 15, 25, 55, 105, 35, 170, 145, 425, 205, 571, 660, 1611, 1010, 1789, 2938, 1345, 5941, 315, 3437, 4596, 5727, 12047, 7317, 21190, 2130, 16533, 19496, 17836, 47949, 36232, 74020, 11940, 73831, 9841, 78981, 55627, 43590, 183208, 15982 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..43.

CROSSREFS

Sequence in context: A100746 A185785 A185905 * A140360 A178821 A145599

Adjacent sequences:  A050338 A050339 A050340 * A050342 A050343 A050344

KEYWORD

nonn

AUTHOR

Christian G. Bower, Oct 15 1999

STATUS

approved

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Last modified December 8 04:27 EST 2016. Contains 278902 sequences.