32021

Appears in sequences

• The n-th n-gonal number: a(n) = n*(n^2 - 3*n + 4)/2.at n=41A060354
• Expansion of 1/(1-x*(1-10*x)).at n=9A146080
• Number of strings of numbers x(i=1..6) in 0..n with sum i*x(i)^2 equal to n*36.at n=19A184445
• Number of 4 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=7A207172
• Number of partitions p of n such that floor(mean(p)) and ceiling(mean(p)) are parts of p.at n=45A241340
• Products of three distinct primes that form an arithmetic progression.at n=29A262723
• Numbers x that are equal to lpf(x)*gpf(x)*(lpf(x)+gpf(x))/2, where lpf(x) < gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.at n=33A307108
• Maximum width of an element in the set of minimal base-n representations of the primes.at n=11A330049
• a(n) is the least k such that A076620(k) = n.at n=10A341803
• Products of three distinct strong primes.at n=31A363782
• Expansion of e.g.f. (1 + x)*(1 + x^2/2)*cosh(x).at n=41A388428
• Number n in the rational base 7/3.at n=40A389934