A025191 a(n) = Sum{T(n,k)}, k = 0,1,...,n, where T is the array defined in A025177.

1, 2, 4, 11, 33, 97, 288, 855, 2544, 7577, 22590, 67399, 201215, 601017, 1795966, 5368659, 16053417, 48015873, 143649102, 429842511, 1286452725, 3850770081, 11528245602, 34517105907, 103360732956, 309543786441, 927106804368, 2776994293355

Offset

0,2

Comments

Conjectures: a(n) = A027914(n)-A027914(n-1) = 1/2*(A081673(n)-A081673(n-1).

Links

Table of n, a(n) for n=0..27.

Crossrefs

Sequence in context: A296270 A123439 A026164 * A192405 A035354 A220902

Adjacent sequences: A025188 A025189 A025190 * A025192 A025193 A025194

Keyword

nonn

Author

Clark Kimberling

Status

approved