38454

Appears in sequences

• a(n)=Sum{T(n,j): j=1,2,...,n}, array T given by A048225.at n=35A048235
• Expansion of (1+x*C)*C^4, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=8A070857
• Even numbers k such that the central binomial coefficient A000984(k, k/2) is divisible by k^2.at n=25A080395
• Triangle read by rows: T(n,k) is the number of Dyck n-paths containing k even-length descents to ground level.at n=44A111301
• Triangle of 2-Eulerian numbers.at n=33A144696
• Riordan array (2c(-x)-1, xc(-x)^3), c(x) the g.f. of A000108.at n=46A159971
• Squarefree numbers which yield zero when their prime factors are xored together.at n=21A235488
• a(n) = n*(n + 5)*(n + 10)*(n + 15)/24.at n=24A264446
• Number of nX4 0..1 arrays with every element unequal to 0, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.at n=12A304948
• Indices of the triangular numbers in A189475.at n=25A358417
• Number of support Tau-tilting modules for some algebras.at n=9A376161