A359877 a(n) is the smallest tetranacci number (A000078) with exactly n prime factors (counted with multiplicity).

1, 2, 4, 8, 56, 108, 5536, 28074040, 39648, 147312, 18566888967365603514688, 9966792788887776, 2775641472, 2505471397838180985096739296, 1445523368993397560000765219760086502994234237205516083525719052320, 44092571484448511101335177770183225655413760

Offset: 0

Author

Ilya Gutkovskiy, Jan 16 2023

Keywords

• nonn

Examples

			a(6) = 5536, because 5536 is a tetranacci number with 6 prime factors (counted with multiplicity) {2, 2, 2, 2, 2, 173} and this is the smallest such number.
		

Links

• Eric Weisstein's World of Mathematics, Prime Factor
• Eric Weisstein's World of Mathematics, Tetranacci Number

Crossrefs

Cf. A000078, A001222, A072397, A359849, A359876, A359879.