28245

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 16.at n=21A031694
• Smaller of a pair of consecutive lucky numbers with a gap of 2n.at n=23A031884
• Numbers whose base-5 representation contains exactly three 0's and three 4's.at n=22A045217
• Reversion of y - y^2 + y^4 - y^5.at n=13A063026
• Number of partitions of n such that the largest part is a multiple of the smallest part.at n=38A117086
• a(n) = 441*n^2 + 21.at n=8A158603
• Number of arrangements of 4 numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=25A188359
• Triangle read by rows giving coefficients of Genocchi q-numbers B_n(1,q) (n >= 1) expanded in powers of q.at n=54A193762
• Number of permutations f of {1,...,n} such that 3^k + 3^(f(k)) - 1 is prime for every k = 1,...,n.at n=18A321766
• Expansion of Product_{i>=1, j>=1} 1 / (1 - x^(i*j*(j + 1)/2)).at n=30A327744