38520

Appears in sequences

• Number of collinear point-triples in an n X n grid.at n=15A000938
• E.g.f.: log((1-x)/(1-3*x+x^2)).at n=6A052878
• Numbers n such that 30*n+7, 30*n+11, 30*n+13, 30*n+17, 30*n+19 are consecutive primes.at n=37A089157
• Numbers n such that 30*n+{1,7,11,13,17,19,29} are all prime.at n=5A100423
• Numbers k such that if k = a*b, then a+b = reversal(k) for some integers a,b > 1.at n=17A161791
• Number of ways of writing n as the sum of 9 triangular numbers.at n=22A226253
• Number of arrays of length n that are sums of 3 consecutive elements of length n+2 permutations of 0..n+1.at n=5A229561
• T(n,k) = number of arrays of length n that are sums of k consecutive elements of length n+k-1 permutations of 0..n+k-2.at n=33A229565
• Number of arrays of length 6 that are sums of n consecutive elements of length 6+n-1 permutations of 0..6+n-2.at n=2A229569
• Number of ways to write n as an ordered sum of 10 nonzero triangular numbers.at n=29A340955
• a(n) = n! * [x^n] (1 - x)*log((1 - x)/(1 - 2*x)).at n=7A355258
• Numbers k such that there are exactly 7 primes between 30*k and 30*k+30.at n=14A385124