774840977

Appears in sequences

• a(0)=1, a(n) = 3*a(n-1) + 2; a(n) = 2*3^n - 1.at n=18A048473
• Number of alpha-beta evaluations in a tree of depth n and branching factor b=3.at n=36A060647
• a(n) = 2*n^n-1.at n=9A062207
• a(n) is least odd integer not a partial sum of 1, 3, ..., a(n-1).at n=36A062547
• Sum of terms in periodic part of continued fraction expansion of square root of -1 + 3^n.at n=35A077631
• 2*3^n-(-1)^n.at n=18A081632
• A048473 prefixed by two zeros.at n=20A154992
• a(n) = 2*9^n-1.at n=9A198859