19082

Appears in sequences

• a(n) = n*(n+1)*(5*n+1)/6.at n=27A033994
• a(1) = 1, a(n+1) is the sum of a(n) and ceiling( arithmetic mean of a(1) ... a(n) ).at n=37A065095
• Number of partitions of n into exactly 5 different parts with distinct multiplicities.at n=28A212116
• E.g.f. satisfies log(A(x)) = (exp(x*A(x)) - 1)^2 * A(x).at n=6A357084
• Numbers with arithmetic derivative which is a palindromic prime number (A002385).at n=29A359332
• Array T(n,m) read by antidiagonals: In an n X m grid draw straight walls between cells, starting at a border, such that the resulting figure is connected and has only one-cell wide paths; T(n,m) is the number of solutions.at n=39A375858
• Array T(n,m) read by antidiagonals: In an n X m grid draw straight walls between cells, starting at a border, such that the resulting figure is connected and has only one-cell wide paths; T(n,m) is the number of solutions.at n=41A375858