69984

Appears in sequences

• MU-numbers: next term is uniquely the product of 2 earlier terms.at n=33A007335
• Numbers of form 3^i*6^j, with i, j >= 0.at n=40A025614
• Numbers of form 6^i*9^j, with i, j >= 0.at n=22A025628
• a(n) = 6*a(n-2), starting with 1, 3, 9.at n=12A026565
• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*4^j.at n=37A038222
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*12^j.at n=12A038302
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*9^j.at n=12A038335
• Numbers m such that m divides (product of digits of m) * (sum of digits of m).at n=23A049101
• a(n) = phi(2^n - 1)/2.at n=16A056742
• Card-matching numbers (Dinner-Diner matching numbers).at n=16A059059
• Card-matching numbers (Dinner-Diner matching numbers).at n=32A059059
• Card-matching numbers (Dinner-Diner matching numbers).at n=16A059067
• Card-matching numbers (Dinner-Diner matching numbers).at n=25A059069
• 5-full numbers: if a prime p divides k then so does p^5.at n=28A069492
• Values of z in positive integer solutions of x^2 + y^5 = z^3, listed in increasing order of z.at n=35A070067
• Goedel encoding of the prime factors of n, in increasing order and repeated according to multiplicity.at n=34A074736
• a(n) = 2^A066657(n) * 3^A066658(n).at n=10A076941
• Product of consecutive previous terms (starting with 2,3).at n=12A080338
• a(n) = n-th multiple of n with digit sum n.at n=35A082260
• Numbers n such that (phi(n) + sigma(n))/(rad(n))^2 is an integer > 1 (phi=A000010, sigma=A000203, rad=A007947).at n=6A097982