1154440

Appears in sequences

• 2nd elementary symmetric function of the first n+1 positive integers congruent to 2 mod 3.at n=30A024391
• Triangular number x such that x + reverse of x is a prime.at n=27A072387
• a(n) = (9n^4 - 18n^3 + 18n^2 - 9n + 2)/2.at n=22A079903
• Numbers that set records for number of divisors of n(n-1).at n=39A192488
• Numbers m such that 3*m+1 and 8*m+1 are both squares.at n=7A245031
• Triangular numbers that are the sum of 2 consecutive terms of A130518.at n=10A247247
• Numbers that have exactly 10 representations as a k-gonal number, P(n,k) = n*((k-2)*n - (k-4))/2, k and n >= 3.at n=3A321160
• The area of the n-th convex honeycomb formed by spirals of incrementing strips of hexagons.at n=15A373081
• Smallest m >= 2*n such that binomial(m,n) is a multiple of m-i for all 0<=i<n, but one.at n=39A389360