2576980377

Appears in sequences

• Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,1.at n=15A037489
• Binary XOR of 2^k - (-1)^k as k varies from 1 to n.at n=30A199402
• Rows of negated binary Walsh matrices interpreted as reverse binary numbers.at n=34A228540
• Decimal representation of the middle column of the "Rule 147" elementary cellular automaton starting with a single ON (black) cell.at n=31A262864
• 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=16A330795