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A078157 A078152(2^n). 3
0, 0, 0, 2, 4, 8, 13, 22, 34, 52, 77, 114, 166, 240, 345, 494, 705, 1004, 1427, 2026, 2873, 4072, 5767, 8166, 11558, 16356, 23141, 32738, 46309, 65504, 92648, 131038, 185328, 262108, 370690, 524250, 741416, 1048536, 1482869, 2097110, 2965777 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..41.

FORMULA

For n>1, a(n) = floor(sqrt(2^(n+2))) - n - 2

CROSSREFS

Cf. A078152, A078153, A078154, A078155, A078156, A078158.

Sequence in context: A164419 A164480 A134035 * A144119 A207033 A291553

Adjacent sequences:  A078154 A078155 A078156 * A078158 A078159 A078160

KEYWORD

nonn

AUTHOR

Labos Elemer, Nov 27 2002

EXTENSIONS

Extended by Robert G. Wilson v, Dec 02 2002

More terms from Max Alekseyev, Feb 12 2012

STATUS

approved

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Last modified April 17 18:52 EDT 2021. Contains 343070 sequences. (Running on oeis4.)