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A263264 Row 4 of A263255. 2
7, 17, 24, 72, 87, 98, 139, 141, 142, 150, 202, 208, 225, 228, 297, 338, 340, 371, 372, 375, 386, 388, 408, 420, 424, 432, 502, 506, 537, 539, 542, 550, 625, 644, 660, 680, 684, 698, 712, 732, 804, 818, 822, 824, 926, 948, 952, 967, 968, 971, 973, 976, 990, 1056, 1062, 1120, 1122 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n for which A263254(n) = 4. Numbers that are four edges 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..1023

PROG

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

(define A263264 (MATCHING-POS 1 0 (lambda (n) (= 4 (A263254 n)))))

CROSSREFS

Cf. A049820, A259934, A263254, A263255.

Sequence in context: A227276 A300298 A273745 * A072199 A309231 A183897

Adjacent sequences:  A263261 A263262 A263263 * A263265 A263266 A263267

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 07 2015

STATUS

approved

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Last modified December 15 09:05 EST 2019. Contains 329995 sequences. (Running on oeis4.)