42680

Appears in sequences

• Octahedral numbers: a(n) = n*(2*n^2 + 1)/3.at n=40A005900
• Number of points of l_1 norm n in the "diamond" lattice D^+_4.at n=22A035878
• a(n) = 4*n^3 + 4*n.at n=22A105374
• Number of points in the standard root system version of the D_4 lattice having L_infinity norm n.at n=11A117216
• Number of partitions p of n such that max(p) - min(p) is not a part of p.at n=41A238494
• a(0) = -1, a(1) = 1, a(n) = a(n-1) + (n-1)*a(n-2) for n > 1.at n=12A291856
• Sum of all the parts in the partitions of n into 8 squarefree parts.at n=44A326444
• Indices n of j-points j(n) for successive positive minima of the Riemann zeta function on critical line.at n=7A329751
• Numbers k such that A011772(k) > A344878(k) and A011772(k) is a divisor of A344875(k).at n=21A344595
• Partial sums of the even triangular numbers (A014494).at n=39A352115
• a(n) is the smallest positive integer which can be represented as the sum of n distinct nonzero tetrahedral numbers in exactly n ways, or -1 if no such integer exists.at n=27A360217
• G.f. A(x) satisfies A(x) = 1 + x + x^4*A(x)^4.at n=19A366558