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A084186 First occurrence of exactly n 1's in the binary expansion of sqrt(2). 4
1, 3, 40, 17, 74, 265, 31, 336, 11937, 1403, 8894, 3524, 33223, 126903, 3067, 109312, 390536, 553171, 280266, 962560 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

The binary expansion of sqrt(2) is 1.0110101000001..(A004539) and at position 17, there are four 1's, framed by 0's, so a(4)=17.

CROSSREFS

Cf. A084185, A084187.

Cf. A233836.

Sequence in context: A319955 A317484 A196159 * A037104 A100306 A101014

Adjacent sequences:  A084183 A084184 A084185 * A084187 A084188 A084189

KEYWORD

base,nonn,more,hard

AUTHOR

Ralf Stephan, May 18 2003

STATUS

approved

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Last modified July 28 14:19 EDT 2021. Contains 346335 sequences. (Running on oeis4.)