629145

Appears in sequences

• Number of Hamiltonian cycles in the directed graph with 2n nodes {0..2n-1} and edges from each i to 2i (mod 2n) and to 2i+1 (mod 2n).at n=24A027362
• Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,1.at n=9A037489
• Binary XOR of 2^k - (-1)^k as k varies from 1 to n.at n=18A199402
• Decimal representation of the middle column of the "Rule 147" elementary cellular automaton starting with a single ON (black) cell.at n=19A262864
• Evaluation of the polynomials given by the Riordan square of the Fibonacci sequence with a(0) = 1 (A193737) at 1/2 and normalized with 2^n.at n=10A330795
• Deficient numbers k > 1 such that k*p is abundant for all primes p dividing k.at n=26A341358