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A050339 Number of factorizations with 2 levels of parentheses indexed by prime signatures. A050338(A025487). 4
1, 1, 4, 4, 10, 16, 30, 54, 22, 75, 74, 176, 102, 206, 267, 535, 399, 518, 950, 526, 1585, 154, 1094, 1446, 1344, 3091, 2252, 4527, 817, 4158, 4879, 3357, 9809, 8811, 12664, 3605, 14653, 3005, 15738, 8429, 10479, 29762, 4777, 16863, 31883, 34631 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..46.

CROSSREFS

Sequence in context: A185904 A201618 A341243 * A087288 A185779 A095009

Adjacent sequences:  A050336 A050337 A050338 * A050340 A050341 A050342

KEYWORD

nonn

AUTHOR

Christian G. Bower, Oct 15 1999

STATUS

approved

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Last modified May 16 08:07 EDT 2021. Contains 343940 sequences. (Running on oeis4.)