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A031126 Number of proper factorizations of p1^n*p2^3, where p1 and p2 are distinct primes. 0
30, 56, 96, 161, 256, 400, 607, 906, 1324, 1913, 2718, 3823, 5312, 7315, 9972, 13494, 18104, 24131, 31937, 42020, 54947, 71483, 92491, 119119 (list; graph; refs; listen; history; internal format)
OFFSET

3,1

CROSSREFS

Cf. A028422.

Sequence in context: A189712 A029713 A154599 * A048451 A154796 A004962

Adjacent sequences:  A031123 A031124 A031125 * A031127 A031128 A031129

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 15:58 EST 2012. Contains 205937 sequences.