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A080978 a(n) = 2*A006046(n) + 1. 3
1, 3, 7, 11, 19, 23, 31, 39, 55, 59, 67, 75, 91, 99, 115, 131, 163, 167, 175, 183, 199, 207, 223, 239, 271, 279, 295, 311, 343, 359, 391, 423, 487, 491, 499, 507, 523, 531, 547, 563, 595, 603, 619, 635, 667, 683, 715, 747, 811, 819, 835, 851, 883, 899, 931, 963 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The number of edges in A080973-trees.

LINKS

Table of n, a(n) for n=0..55.

CROSSREFS

Sequence in context: A085760 A179481 A131426 * A160216 A181516 A285015

Adjacent sequences:  A080975 A080976 A080977 * A080979 A080980 A080981

KEYWORD

nonn

AUTHOR

Antti Karttunen Mar 02 2003

STATUS

approved

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Last modified February 19 18:51 EST 2019. Contains 320328 sequences. (Running on oeis4.)