A050341 Number of factorizations with 3 levels of parentheses indexed by prime signatures. A050340(A025487).
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
Offset: 1