A027123 a(n) = A027113(n, 2n-5).

1, 4, 13, 44, 145, 467, 1475, 4588, 14099, 42919, 129685, 389578, 1164909, 3470513, 10309111, 30551216, 90368547, 266900346, 787325255, 2320267136, 6832609927, 20108081817, 59149096985, 173927024292, 511290023185

Offset

3,2

Links

Table of n, a(n) for n=3..27.

Crossrefs

Sequence in context: A345230 A117882 A257674 * A291236 A339850 A273904

Adjacent sequences: A027120 A027121 A027122 * A027124 A027125 A027126

Keyword

nonn

Author

Clark Kimberling

Status

approved