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A031125 Number of proper factorizations of p1^n*p2^2, where p1 and p2 are distinct primes. 0
8, 15, 28, 46, 76, 117, 180, 266, 391, 559, 796, 1110, 1540, 2105, 2862, 3845, 5141, 6807, 8972, 11732, 15274, 19752, 25442, 32581, 41568, 52769 (list; graph; refs; listen; history; internal format)
OFFSET

2,1

CROSSREFS

Cf. A028422.

Sequence in context: A129076 A072177 A169875 * A132298 A188558 A123526

Adjacent sequences:  A031122 A031123 A031124 * A031126 A031127 A031128

KEYWORD

nonn

AUTHOR

Jeff Burch (jmburch(AT)osprey.smcm.edu)

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Last modified February 16 02:51 EST 2012. Contains 205860 sequences.