30225

Appears in sequences

• Number of factorization patterns of polynomials of degree n over F_5.at n=22A006170
• Number of segments (and sides) created by diagonals of an n-gon in general position.at n=23A014628
• Numbers k such that the sum of the squares of the divisors of k is divisible by k.at n=32A046762
• Spiro-tribonacci numbers: a(n) = sum of three previous terms that are nearest when terms arranged in a spiral.at n=34A092360
• Row sums of triangle A134392.at n=24A134393
• Coefficients in a q-analog of the LambertW function, as a triangle read by rows.at n=51A152290
• Expansion of Product_{k>=1} (1 + x^k)/(1 - 2*x^k).at n=12A264685
• Numerator of the continued fraction [Sum_{k=0..n} k; 1, 2, 3,..., n].at n=5A266579
• Number of solutions to x^3 + y^3 + z^3 + t^3 == 1 (mod n) for 1 <= x, y, z, t <= n.at n=30A276919
• a(n) = Product_{d|n, d>1} prime(A286622(d)-1).at n=44A305794
• a(n) = Product_{d|n, d>1} prime(1+(d mod 12)).at n=49A320112
• Numbers k such that the sum of the squares of the odd divisors of k (A050999) is divisible by k.at n=18A355543
• Primitive terms of A359563: terms of A359563 with no proper divisor in A359563.at n=41A359564