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A031128 Number of proper factorizations of p1^n*p2^5, where p1 and p2 are distinct primes. 0

%I #7 May 01 2017 13:28:15

%S 6,18,46,96,188,338,588,974,1575,2471,3803,5726,8497,12399,17873,

%T 25432,35817,49907,68938,94377,128233,172916,231629,308239,407803,

%U 536411,701909,913772,1184021,1527164,1961431,2508761,3196472

%N Number of proper factorizations of p1^n*p2^5, where p1 and p2 are distinct primes.

%F a(n) = A000491(n) - 1 = A028422(2^n*3^5). - _Ray Chandler_, May 01 2017

%Y Cf. A000491, A028422.

%K nonn

%O 0,1

%A _Jeff Burch_

%E Offset changed to 0, a(13)=12399 corrected and more terms added by _Ray Chandler_, May 01 2017

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Last modified April 18 11:00 EDT 2024. Contains 371779 sequences. (Running on oeis4.)