699030

Appears in sequences

• Expansion of x^4/((1-2*x)*(x^2-x+1)*(x-1)^2).at n=21A111926
• Second diagonal of Gely numbers.at n=20A132796
• Rectangular array A read by upward antidiagonals in which the entry in row n and column k is defined by A(n,k) = (2^a(n)*(6*k - (3 - (-1)^a(n))*(1 - (-1)^n)/2) - 2^n + 4)/6, n,k >= 1, where {a(n)} is the Beatty sequence A117630 defined by a(n) = floor(n*log(3)/log(3/2)).at n=38A254312
• Number of permutations of length n having exactly one descent such that the first element of the permutation is an odd number.at n=19A257198