18874361

Appears in sequences

• a(n) = T(8,n), array T given by A047858.at n=20A048469
• Expansion of (1-x+7x^2)/((1-x)(1-2x)).at n=22A154251
• a(2*n) = 9*2^n - 7, a(2*n+1) = 3*2^(n+2) - 7.at n=42A354789