26898
domain: N
Appears in sequences
- Coordination sequence for C_3 lattice: a(n) = 16*n^2 + 2 (n>0), a(0)=1.at n=41A010006
- Barely abundant numbers: abundant n such that sigma(n)/n < sigma(m)/m for all abundant numbers m<n, sigma(n) being the sum of the divisors of n.at n=17A071927
- Expansion of x/((1-x-x^3)*(1-x)^3).at n=20A226405
- Number of partitions of n such that the number of even parts is a part or the number of odd parts is a part.at n=41A240576
- p-INVERT of (0,1,0,1,0,1,...), where p(S) = (1 - S^3)^2.at n=21A291240
- Number of quadratically embeddable graphs on n nodes.at n=8A363960