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A339732
Let G be the undirected graph with nodes {g_k, k > 0} such that for any k > 0, g_k is connected to g_{k+1} and g_{A064413(k)} is connected to g_{A064413(k+1)}; a(n) is the number of nodes at distance n from g_1.
3
1, 1, 2, 3, 5, 6, 8, 11, 15, 17, 28, 39, 48, 64, 94, 116, 164, 217, 289, 395, 542, 729, 919, 1154, 1598, 2091, 2747, 3702, 4867, 6338, 8290, 10873, 14533, 18919, 24577, 31918, 41857
OFFSET
0,3
LINKS
Dana G. Korssjoen, Biyao Li, Stefan Steinerberger, Raghavendra Tripathi, and Ruimin Zhang, Finding structure in sequences of real numbers via graph theory: a problem list, arXiv:2012.04625, Dec 08, 2020.
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Rémy Sigrist, Dec 14 2020
STATUS
approved