258280325

Appears in sequences

• a(0)=1, a(n) = 3*a(n-1) + 2; a(n) = 2*3^n - 1.at n=17A048473
• Number of alpha-beta evaluations in a tree of depth n and branching factor b=3.at n=34A060647
• a(n) is least odd integer not a partial sum of 1, 3, ..., a(n-1).at n=34A062547
• Second generation sequence in which each number is skipped that can be written as sum of distinct previous entries. To make the first generation we start with all natural numbers: this gives the powers of 2 (A000079). For the second generation we start with the natural numbers from which are removed the numbers of the first generation.at n=34A072134
• Sum of terms in periodic part of continued fraction expansion of square root of -1 + 3^n.at n=33A077631
• A048473 prefixed by two zeros.at n=19A154992
• 2*3^(n-1)-(-1)^n.at n=17A174132
• a(n) = 6*9^n-1.at n=8A198963