A257512 Those vertices of the binary beanstalk whose children are both leaves.

10, 18, 25, 34, 41, 54, 56, 66, 73, 86, 88, 102, 110, 117, 119, 130, 137, 150, 152, 166, 174, 181, 183, 198, 206, 213, 222, 229, 243, 244, 246, 258, 265, 278, 280, 294, 302, 309, 311, 326, 334, 341, 350, 357, 371, 372, 374, 390, 398, 405, 414, 421, 435, 436, 446, 453, 467, 468, 483, 491, 498, 499, 501, 514

Offset: 1

Author

Antti Karttunen, May 03 2015

Keywords

• nonn

Comments

Numbers n for which both A079559(A213723(n)) and A079559(A213724(n)) are zero.

Numbers which occur twice in A257507.

Examples

			10 is present, because A011371(12) = A011371(13) = 10, and both 12 and 13 are terms of A055938. See also Paul Tek's illustration.
		

Links

• Antti Karttunen, Table of n, a(n) for n = 1..16384
• Paul Tek, Illustration of how natural numbers in range 0 .. 133 are organized as a binary tree in the binary beanstalk

Crossrefs

Cf. A011371, A055938, A079559, A213723, A213724, A257507, A257265.

First differences: A256490.

Subsequence of A005187, A213717 and A257508.