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A263261 Row 1 of A263255. 2
1, 9, 10, 25, 26, 28, 38, 49, 52, 66, 68, 74, 76, 80, 82, 110, 112, 122, 124, 126, 127, 131, 133, 156, 168, 169, 170, 172, 176, 178, 180, 188, 218, 226, 234, 238, 258, 278, 288, 290, 300, 304, 306, 316, 318, 322, 334, 361, 362, 368, 398, 414, 422, 448, 452, 470, 478, 496, 514, 518, 526, 586 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Numbers n for which A263254(n) = 1. Numbers that are one edge removed from the infinite trunk (A259934) of the tree defined by edge-relation A049820(child) = parent.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

PROG

(Scheme, with Antti Karttunen's IntSeq-library)

(define A263261 (MATCHING-POS 1 0 (lambda (n) (= 1 (A263254 n)))))

CROSSREFS

Cf. A049820, A259934, A263254, A263255.

Cf. also A262901.

Sequence in context: A228378 A326464 A174042 * A290275 A156787 A025043

Adjacent sequences:  A263258 A263259 A263260 * A263262 A263263 A263264

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 07 2015

STATUS

approved

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Last modified October 23 23:51 EDT 2019. Contains 328379 sequences. (Running on oeis4.)