25420

Appears in sequences

• a(n) = (11*n+1)*(11*n+10).at n=14A001536
• Number of lines through exactly 3 points of an n X n grid of points.at n=31A018810
• a(n) = [ (3rd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+2 positive integers congruent to 2 mod 3}.at n=14A024399
• Numbers n such that p(n),p(n)+6,p(n)+12,p(n)+18 are consecutive primes and p(n)=6*k+1 for some k, where p(n) denotes n-th prime.at n=37A090838
• Row sums of triangle A144881 (S1hat(3)) and of array A144880 (M31hat(3)).at n=6A144882
• Sum of the odd parts in the partitions of n into 5 parts.at n=41A309545
• a(1) = 1; a(2) = 2; thereafter a(n) is the smallest number > a(n-1) which is neither of the form 2*a(i) nor Sum_{j=1..n-1} ( b_j*a(j) ) where 0 < i < n, b_j = 1 or 0.at n=17A331809
• Self-convolution of n-th antidiagonal of the natural number array (so named in the Comments section of A000027).at n=9A387429