A047137 a(n) = T(n,n+2), array T as in A047130.

1, 3, 9, 28, 104, 367, 1295, 4600, 17229, 64069, 238148, 886823, 3366045, 12793452, 48663267, 185303586, 711046282, 2734845898, 10532016662, 40599379289, 157049408777, 608667818351, 2361851906708, 9173261457282

Offset

0,2

Links

Table of n, a(n) for n=0..23.

Crossrefs

Cf. A047130.

Sequence in context: A148936 A121656 A148937 * A058145 A218915 A258064

Adjacent sequences: A047134 A047135 A047136 * A047138 A047139 A047140

Keyword

nonn

Author

Clark Kimberling

Extensions

Definition corrected by Georg Fischer, Jan 20 2020

Status

approved