20801199

Appears in sequences

• Crystal ball sequence for D_5 lattice.at n=22A008356
• a(n) = 2*A000984(n) - 1.at n=13A134760
• a(n) = (1/2)*( (1 + (-1)^n)*A134760(n/2) + (1 - (-1)^n) ).at n=26A134761