40310784

Appears in sequences

• Third column of triangle A067410 and second column of A067417.at n=10A067411
• Smallest number beginning with 4 and having exactly n prime divisors counted with multiplicity.at n=19A106424
• a(n) = 6*a(n-2) for n > 2; a(1) = 1, a(2) = 4.at n=19A164532
• a(n) = 6*a(n-2) for n > 2; a(1) = 4, a(2) = 1.at n=18A166027
• Expansion of 36*x^2*(1+6*x-36*x^2) / ( (1-6*x)^2 *(1+6*x+36*x^2) ).at n=8A181685
• a(n) = product of first k composites, with the i-th composite raised to the d-th power, where k = A055642(n) and d is the i-th digit of n.at n=18A270142
• Number of permutations p of [n] such that p(i)-i is a multiple of nine for all i in [n].at n=28A275064
• Records in A319100.at n=35A307252
• a(n) is the number of preference profiles in the stable marriage problem with n men and n women such that there are n pairs of soulmates (people who rank each other first).at n=3A343698
• Irregular triangle T(n,k) read by rows, where T(n,k) is the number of preference profiles in the stable marriage problem with n men and n women such that there exists a stable matching with an egalitarian cost of k.at n=27A344691
• Irregular triangle read by rows in which T(n,k) is the number of stable matchings in the stable marriage problem with n men and n women such that there exists a stable matching with an egalitarian cost of k.at n=27A344692
• Number of ways to tile a double-hexagon strip of n hexagons, using single and double hexagons.at n=30A354541