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A031125 Number of proper factorizations of p1^n*p2^2, where p1 and p2 are distinct primes. +0
1
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; listen)
OFFSET

2,1
CROSSREFS

Cf. A028422.

Sequence in context: A069826 A129076 A072177 this_sequence A132298 A123526 A083686

Adjacent sequences: A031122 A031123 A031124 this_sequence A031126 A031127 A031128

KEYWORD

nonn

AUTHOR

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

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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