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a(n) is the index of the smallest tribonacci number (A000073) with exactly n prime factors (counted with multiplicity).
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%I #8 Jan 19 2023 11:09:29

%S 2,4,5,9,8,17,13,52,16,40,36,32,62,88,96,144,112,221,256,208,400,192

%N a(n) is the index of the smallest tribonacci number (A000073) with exactly n prime factors (counted with multiplicity).

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PrimeFactor.html">Prime Factor</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TribonacciNumber.html">Tribonacci Number</a>

%Y Cf. A000073, A001222, A072396, A359850, A359876, A359879.

%K nonn,more

%O 0,1

%A _Ilya Gutkovskiy_, Jan 16 2023

%E a(17)-a(21) from _Daniel Suteu_, Jan 18 2023