29784

Appears in sequences

• Energy function for hexagonal lattice.at n=10A007239
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Fibonacci numbers), t = (odd natural numbers).at n=26A024463
• Ulam numbers such that n/2 is also an Ulam number.at n=20A068799
• Numbers k such that reverse(gpf(k)) = gpf(k+1), where gpf(n) = A006530(n); a(1)=1.at n=37A071844
• Intersection of A108027, A108028, A108029 and A108030.at n=13A108109
• Difference between the cubes and 2*tetrahedral numbers; A000578(n) - 2*A000292(n).at n=36A146298
• a(n) = 1728*n - 1320.at n=17A157263
• Number of -n..n arrays x(0..3) of 4 elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing.at n=23A200193
• Antidiagonal sums of the convolution array A213783.at n=31A213760
• Principal diagonal of the convolution array A213768.at n=13A213769
• Number of partitions of n such that (number parts having multiplicity 1) is not a part and (number of parts > 1) is not a part.at n=46A241514