31116

Appears in sequences

• Octahedral numbers: a(n) = n*(2*n^2 + 1)/3.at n=36A005900
• Number of partitions of n into parts not of the form 25k, 25k+4 or 25k-4. Also number of partitions with at most 3 parts of size 1 and differences between parts at distance 11 are greater than 1.at n=42A036003
• Number of nondecreasing arrangements of 7 numbers x(i) in -(n+5)..(n+5) with the sum of sign(x(i))*x(i)^2 zero.at n=12A188007
• Coefficients in Molien series for 5-dimensional faithful representation of Horrocks-Mumford group G_{HM}.at n=43A258702
• The forgotten topological index of the Aztec diamond AZ(n) (see the Ramanes et al. reference, Theorem 2.1).at n=14A292346
• Partial sums of the even triangular numbers (A014494).at n=35A352115