25328

Appears in sequences

• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Lucas numbers), t = (odd natural numbers).at n=23A025093
• Denominators of continued fraction convergents to sqrt(274).at n=10A041515
• Number of n X 2 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, vertically or antidiagonally.at n=11A232935
• Number of length n 0..2 arrays with no pair in any consecutive three terms totalling exactly 2.at n=24A245989
• a(n) = 4*n^3 - 18*n^2 + 27*n - 12.at n=19A271828
• Number of powerful rooted trees with n nodes.at n=30A317707
• Number of aperiodic arrays of positive integers summing to n.at n=14A323867
• Total numbers of graceful labelings of all simple graphs on n nodes.at n=5A333727
• Expansion of 1/( (1 + x)^2 * (1 - x^2*(1 + x)^3) ).at n=19A375365