199424

Appears in sequences

• Number of points of L1 norm 2n in root system version of E_8 lattice.at n=8A010369
• Duplicate of A010369.at n=8A035880
• L1-coordination sequence for E_8 lattice in Construction A version of the lattice.at n=8A045651
• Structured snub cubic numbers.at n=31A100150
• Number of (n+2) X 3 0..2 matrices with each 3 X 3 subblock idempotent.at n=16A224599
• T(n,k) = 1/k! * Sum_{i=0..k} (-1)^(k-i) *C(k,i) * A258306(n,i); triangle T(n,k), n>=0, 0<=k<=floor(n/2), read by rows.at n=52A258307