32130

Appears in sequences

• Smaller of unitary amicable pair.at n=3A002952
• Number of tree-rooted toroidal maps with 3 faces and n vertices and without isthmuses.at n=2A006437
• Coordination sequence for A_4 lattice.at n=14A008383
• Area of more than one Pythagorean triangle.at n=26A009127
• n written in fractional base 4/3.at n=20A024631
• Numbers k such that phi(k)+sigma(k) is a perfect cube.at n=22A061366
• Unitary amicable numbers.at n=6A063991
• Triangle read by rows in which row n gives coefficients of polynomial R_n(y) that satisfies R_n(1/3) = 9^n, where R_n(y) forms the initial (n+1) terms of g.f. A097191(y)^(n+1).at n=13A097190
• a(n) = binomial(n+2,2)*binomial(n+5,2).at n=16A105938
• Decagonal numbers divisible by 10.at n=18A117797
• 10-gonal numbers which are divisible by the sum of their digits.at n=32A119548
• a(n) = area of Pythagorean triangle with hypotenuse p, where p = A002144(n) = n-th prime == 1 (mod 4).at n=35A145010
• Number of integer sequences of length n+1 with sum zero and sum of absolute values 28.at n=3A157063
• Numbers n such that sigma(n) = 15*phi(n) (where sigma=A000203, phi=A000010).at n=4A171260
• Sequence related to the Hankel transform of A105523(n+5).at n=33A181474
• a(n) = floor(n^(3/2))*floor(3+n^(3/2))/2.at n=39A185593
• Smallest number which is an unordered sum of two odd abundant numbers in exactly n ways.at n=25A187743
• Numbers with prime factorization pqrst^3.at n=18A189984
• 26-gonal pyramidal numbers: a(n) = n*(n+1)*(8*n-7)/2.at n=20A256646
• a(1)=2310; for n > 1, a(n) is the least integer not occurring earlier such that a(n) shares exactly five distinct prime divisors with a(n-1).at n=37A264718