35649

Appears in sequences

• Numerator of 3 * H(n,3,1), a generalized harmonic number. See A075135.at n=5A074596
• Structured meta-anti-prism numbers, the n-th number from a structured n-gonal anti-prism number sequence.at n=16A100185
• To compute a(n) we first write down 3^n 1's in a row. Each row takes the rightmost 3rd part of the previous row and each element in it equals sum of the elements of the previous row starting with the first of the rightmost 3rd part. The single element in the last row is a(n).at n=5A109055
• Numbers k such that binomial(5k, k) - 1 is prime.at n=17A125242
• Number A(n,k) of n-tuples (p_1, p_2, ..., p_n) of positive integers such that p_{i-1} <= p_i <= k^(i-1); square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=41A355576