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A031127 Number of proper factorizations of p1^n*p2^4, where p1 and p2 are distinct primes. 1
4, 11, 28, 56, 108, 188, 322, 521, 830, 1278, 1940, 2875, 4214, 6065, 8643, 12150, 16932, 23335, 31920, 43263, 58249, 77824, 103361, 136370, 178974, 233531, 303267, 391830, 504068, 645519, 823418, 1046066, 1324135, 1669949, 2099103 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n) = A000465(n) - 1 = A028422(2^n*3^4). - Ray Chandler, May 01 2017
CROSSREFS
Sequence in context: A096124 A269076 A282641 * A239031 A289217 A329141
KEYWORD
nonn
AUTHOR
EXTENSIONS
Offset changed to 0 and more terms added by Ray Chandler, May 01 2017
STATUS
approved

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Last modified February 28 07:05 EST 2024. Contains 370387 sequences. (Running on oeis4.)