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A061851 Digital representation of n contains only 1's and 0's, is palindromic and contains no singleton 1's or 0's. 3
11, 111, 1111, 11111, 110011, 111111, 1100011, 1111111, 11000011, 11100111, 11111111, 110000011, 111000111, 111111111, 1100000011, 1100110011, 1110000111, 1111001111, 1111111111, 11000000011, 11001110011, 11100000111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Ray Chandler, Table of n, a(n) for n = 1..10000 (first 608 terms from N. J. A. Sloane)

N. J. A. Sloane, 2178 And All That, Fib. Quart., 52 (2014), 99-120.

FORMULA

a(n) = A001232(n)/99 = A008918(n)/198.

CROSSREFS

Number of terms with k digits is Fibonacci(floor(k/2)) = A000045(A004526(k)).

Union of this sequence and twice this sequence is A061852 and 99 times that is A008919.

Cf. A214927, A001232, A222814, A008918, A008919, A222813.

Sequence in context: A283849 A283604 A090103 * A247552 A138145 A165370

Adjacent sequences:  A061848 A061849 A061850 * A061852 A061853 A061854

KEYWORD

base,nonn

AUTHOR

Henry Bottomley, May 10 2001

STATUS

approved

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Last modified June 24 07:56 EDT 2021. Contains 345416 sequences. (Running on oeis4.)