15116544

Appears in sequences

• a(n) = 6*a(n-2), starting with 1, 3, 9.at n=18A026565
• a(n) = n*6^(n-1).at n=8A053469
• Sixth column of triangle A067417.at n=6A067421
• Denominators of upper bounds for Lagrange-remainder in Taylor's expansion of log((1+x)/(1-x)) multiplied by 6/5.at n=4A096953
• Number of functions f:[n]->[n] such that f[(x^2) mod n]=[f(x)^2] mod n for all x in [n], for n=1,2,3,... Here [n] denotes {0,1,2,...,n-1}.at n=21A117988
• Cyclic quadrilateral numbers: numbers m = a*b*c*d such that the integers a,b,c,d are the sides of a cyclic quadrilateral whose area and circumradius are integers.at n=25A218431
• Maximal values of permanent on (0,1) square matrices of order n with row and column sums 3.at n=25A232553
• Squares equal to the difference between two successive primes of the form k^2+2 in the order in which they appear in A056899.at n=22A261655
• Numbers k such that k^2 is the sum of two positive 5th powers.at n=28A291850
• Triangle read by rows: T(0,0) = 1; T(n,k) = 6*T(n-1,k) + T(n-2,k-1) for k = 0..floor(n/2); T(n,k)=0 for n or k < 0.at n=31A304255
• a(0) = 1; for n > 0, a(n) = A002828(n) * a(n-A002828(n)), where A002828(n) is the least number of squares that add up to n.at n=47A320002
• The sum of the coefficients of x^k in the expansion of (x + x^2 + x^3 + x^4 + x^5 + x^6)^n with k divisible by 4.at n=9A362365
• Numbers with 11 odd divisors.at n=9A368950
• a(n) = n^4*tau(n).at n=35A386013
• Powers k^m, m > 1, where k is an Achilles number whose squarefree kernel is a primorial.at n=15A389226
• Powers k^m, m > 1, where k is an Achilles number that has a primorial kernel but is not a product of primorials.at n=6A389374
• Powers k^m, m > 1, where k is an Achilles number that is not a product of primorials.at n=26A389814
• Powers k^m, m > 1, where k is an even Achilles number.at n=30A391376