21378

Appears in sequences

• Triangle T(n,k) of coefficients of Meixner polynomials of degree n, k=0..n.at n=59A060338
• Triangle read by rows: T(n,k) = number of degree-n permutations with k odd cycles, k=0..n, n >= 0.at n=61A060524
• Triangle M(k,n) read by rows: coefficients of Meixner polynomials.at n=31A094368
• Number of n X 2 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.at n=11A201533
• n*(n+1)*(n+2)*(n+3)*(20*n^2+72*n+43)/360.at n=7A214616
• Numbers n such that usigma(n) = usigma(2*n+1) where usigma(n) = A034448(n).at n=4A286837
• a(n) = minimal value of n+k (with k >= 1) such that the concatenation of the decimal digits of n,n+1,...,n+k is divisible by n+k+1, or -1 if no such n+k exists.at n=51A332584