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A079492 Nearest integer to Sum(binomial(n,k)/2^(k*(k-1)/2), k = 0 .. n). 1
1, 2, 4, 6, 9, 12, 17, 23, 31, 41, 52, 66, 82, 101, 124, 150, 180, 215, 254, 299, 351, 408, 473, 546, 628, 719, 820, 932, 1055, 1192, 1342, 1508, 1689, 1887, 2104, 2340, 2597, 2876, 3179, 3507, 3863, 4247, 4662, 5108, 5590, 6107, 6663, 7259, 7899, 8583, 9316, 10099 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

D. L. Kreher and D. R. Stinson, Combinatorial Algorithms, CRC Press, 1999, p. 113.

LINKS

Table of n, a(n) for n=0..51.

EXAMPLE

1, 2, 7/2, 45/8, 545/64, 12625/1024, 564929/32768, 49162689/2097152, ...

MAPLE

f := n->add(binomial(n, k)/2^(k*(k-1)/2), k=0..n);

CROSSREFS

Cf. A079491.

Sequence in context: A102379 A238374 A133041 * A173784 A094660 A005690

Adjacent sequences:  A079489 A079490 A079491 * A079493 A079494 A079495

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 20 2003

STATUS

approved

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Last modified July 30 00:51 EDT 2014. Contains 245051 sequences.