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 A366782 Number of divisors of A000073(n) (tribonacci numbers). 4
 1, 1, 2, 3, 2, 2, 8, 6, 5, 2, 4, 24, 6, 8, 21, 16, 3, 8, 16, 12, 8, 12, 8, 6, 12, 12, 8, 80, 12, 24, 168, 20, 16, 12, 144, 24, 32, 16, 128, 12, 4, 16, 4, 32, 32, 16, 96, 320, 4, 48, 72, 216, 8, 32, 256, 48, 4, 8, 32, 48, 384, 32, 96, 576, 12, 4, 16, 36, 8, 8 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,3 LINKS Amiram Eldar, Table of n, a(n) for n = 2..365 FORMULA a(n) = A000005(A000073(n)). EXAMPLE a(8)=8 because the 8th tribonacci number 24 has divisors {1, 2, 3, 4, 6, 8, 12, 24}. MATHEMATICA DivisorSigma[0, LinearRecurrence[{1, 1, 1}, {1, 1, 2}, 70]] (* Amiram Eldar, Oct 23 2023 *) CROSSREFS Cf. A000005, A000073, A366780, A366781, A366783, A063375. Sequence in context: A300862 A151863 A365407 * A134142 A353390 A298310 Adjacent sequences: A366779 A366780 A366781 * A366783 A366784 A366785 KEYWORD nonn AUTHOR Sean A. Irvine, Oct 22 2023 STATUS approved

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Last modified February 22 09:32 EST 2024. Contains 370250 sequences. (Running on oeis4.)