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Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!) A361464 Numbers k such that A135504(k+1) / A135504(k) is a multiple of 4. 5 6, 10, 18, 21, 22, 30, 32, 42, 45, 46, 58, 66, 68, 70, 78, 82, 85, 91, 93, 102, 106, 114, 117, 126, 128, 130, 133, 138, 140, 141, 150, 162, 165, 166, 171, 176, 178, 187, 190, 198, 200, 205, 210, 212, 213, 214, 222, 226, 234, 235, 238, 248, 250, 253, 261, 262, 267, 270, 282, 294, 301, 306, 308, 310, 320 (list; graph; refs; listen; history; text; internal format) OFFSET 1,1 COMMENTS Numbers k for which A135506(n) == 3 (mod 4). LINKS Table of n, a(n) for n=1..65. PROG (PARI) isA361464(n) = A361463(n); CROSSREFS Positions of 3's in A361462. Cf. A135504, A135506, A361461, A361463 (characteristic function). Sequence in context: A116001 A111617 A315359 * A344882 A344975 A315360 Adjacent sequences: A361461 A361462 A361463 * A361465 A361466 A361467 KEYWORD nonn AUTHOR Antti Karttunen, Mar 14 2023 STATUS approved

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Last modified August 18 15:26 EDT 2024. Contains 375269 sequences. (Running on oeis4.)