24114

Appears in sequences

• Expansion of (1+6*x)/((1-2*x-x^2)*(1-x)^2).at n=9A051959
• Sum of a(n) terms of 1/k^(9/10) first exceeds n.at n=18A056186
• a(n) = 2*a(n-1) - 3*a(n-2) + 2*a(n-3) with a(0) = 3, a(1) = 4, a(2) = 0.at n=27A105576
• Sum of even products minus sum of odd products of different pairs of numbers from 1 to n.at n=23A134449
• Expansion of 1 + Sum_{n>=1} (x^(n^2) / Product_{k>=n} (1 - x^k)).at n=38A188216
• a(n) = 108*n^2 - 228*n + 114 (n>=2).at n=14A304618
• G.f.: Sum_{n>=0} (n+1)*(n+2)/2 * (x + x^n)^n.at n=43A325998
• a(n) is the number of 2-point antichains in the poset D_{2n+1} of type D, whose elements are compositions of 2n+1.at n=22A344791