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Search: id:A097713
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A097713 Column 1 of triangle A097712. +0
2
1, 3, 8, 25, 111, 809, 10360, 236952, 9708797, 714862984, 95000655195, 22902964060238, 10070812803900694, 8120691251242651341, 12070960239863869828931, 33238610095183531376362138 (list; graph; listen)
OFFSET

0,2

COMMENT

Equals the partial sums of A016121; the row sums of triangle A097712 equals A016121. A016121 equals the number of sequences (a_1, a_2, ..., a_n) of length n with a_1 = 1 satisfying a_i <= a_{i+1} <= 2*a_i.

CROSSREFS

Cf. A097712, A016121.

Sequence in context: A012408 A051403 A004205 this_sequence A009392 A130648 A061812

Adjacent sequences: A097710 A097711 A097712 this_sequence A097714 A097715 A097716

KEYWORD

nonn

AUTHOR

Paul D. Hanna (pauldhanna(AT)juno.com), Aug 24 2004

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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