A080293 - OEIS

A080293

A014486-encoding of the branch-reduced binomial-mod-2 binary trees.

2, 50, 14642, 3969842, 267572689202, 69427226972978, 4581045692538239282, 301220569271221714981682, 1295918094920364850246919050705202, 332029112115571675270693117549056818

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

COMMENTS

These are obtained from the stunted binomial-mod-2 zigzag trees (A080263) either by extending each leaf to a branch of two leaves, or by branch-reducing every other such tree.

LINKS

Table of n, a(n) for n=0..9.

FORMULA

a(n) = A080310(A080263(n)) = A014486(A080298(A080265(n))) = A014486(A080979(A080265(2*n)))

CROSSREFS

a(n) = A014486(A080295(n)). Same sequence in binary: A080294. Breadth-first-wise encoding: A080318. "Moose-trees" obtained from these: A080973. Cf. A080292, A080297.

Sequence in context: A355629 A203766 A197487 * A084107 A203746 A230561

Adjacent sequences: A080290 A080291 A080292 * A080294 A080295 A080296

KEYWORD

nonn

AUTHOR

Antti Karttunen, Mar 02 2003

STATUS

approved