A047133 T(n,n-1), array T as in A047130.

1, 2, 5, 14, 28, 84, 272, 1679, 5564, 19613, 70504, 311534, 1172750, 4405073, 16581264, 67108040, 260573610, 1004778126, 3867996120, 15289911196, 59854486782, 233437968413, 909025875014, 3575067252387, 14038457059264

Offset

1,2

Links

Table of n, a(n) for n=1..25.

Crossrefs

Sequence in context: A212340 A304719 A022630 * A031874 A120328 A026011

Adjacent sequences: A047130 A047131 A047132 * A047134 A047135 A047136

Keyword

nonn

Author

Clark Kimberling

Extensions

Definition corrected by Georg Fischer, Jan 20 2020

Status

approved