A204576 Floor[A055792(n-1)/2]=A084703(n-2) (truncated squares), written in binary.

0, 0, 100, 10010000, 1001100100100, 101000101001000000, 10101100100100101100100, 1011011100110011010100010000, 110000100111101101100001011000100, 11001110011101010100101010100100000000, 1101101100101100000000000111010111101000100

Offset

1,3

Comments

A204575 with the last (binary) digit (necessarily = 1, except for a(1)=0) deleted.

Also: Squares, written in binary, such that appending a (binary) digit (necessarily = 1) yields another square (except for a(1)=0 which corresponds to A204575(1)=00, the only square which remains square when multiplied by 2).

Links

David W. Wilson, Table of n, a(n) for n = 1..100

Crossrefs

See also A031149=sqrt(A023110) (base 10), A204502=sqrt(A204503) (base 9), A204514=sqrt(A055872) (base 8), A204516=sqrt(A055859) (base 7), A204518=sqrt(A055851) (base 6), A204520=sqrt(A055812) (base 5), A004275=sqrt(A055808) (base 4), A001075=sqrt(A055793) (base 3), A001541=sqrt(A055792) (base 2).

Sequence in context: A265720 A343182 A013855 * A061890 A333024 A126686

Adjacent sequences: A204573 A204574 A204575 * A204577 A204578 A204579

Keyword

nonn,base

Author

M. F. Hasler, Jan 16 2012

Status

approved