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A329733 Number of sequences n = b_1 < b_2 < ... < b_t = A329732(n) such that b_1*b_2*...*b_t is a perfect cube. 0

%I #8 Nov 23 2019 21:06:22

%S 1,1,1,2,2,4,2,6,1,1,1,68,1,180,4,2,1,2968,1,31724,2,2,8

%N Number of sequences n = b_1 < b_2 < ... < b_t = A329732(n) such that b_1*b_2*...*b_t is a perfect cube.

%C Conjecture: records are at 0 and the odd primes.

%e For n = 5, the a(5) = 4 sequences are

%e 5 * 6 * 9 * 10 * 15 * 18 = 90^3,

%e 5 * 6 * 8 * 9 * 10 * 15 * 18 = 180^3,

%e 5 * 10 * 15 * 16 * 18 = 60^3, and

%e 5 * 8 * 10 * 15 * 16 * 18 = 120^3.

%Y Cf. A329732.

%K nonn,more

%O 0,4

%A _Peter Kagey_, Nov 19 2019

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Last modified April 24 07:00 EDT 2024. Contains 371920 sequences. (Running on oeis4.)