This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A364151 #13 Jul 11 2024 13:16:31 %S A364151 1,560,19600,43680,45760,893200,1521520,7207200,29269240,2845642800, %T A364151 22778408800,26595476600,59777945920,199910480000,239526427140, %U A364151 249466897680,283345302240,3280499995500,20894643369600,115333903584900,408688050971200,706949015272500,4613394351142500 %N A364151 Tetrahedral numbers that are products of smaller tetrahedral numbers. %e A364151 1 is a term because 1 is a tetrahedral number and equals the empty product. %e A364151 560 is a term because 560 = C(16,3) = C(5,3) * C(8,3). (C(n,k) is the binomial coefficient.) %e A364151 45760 is a term because 45760 = C(66,3) = C(4,3)^2 * C(5,3) * C(13,3). %e A364151 3280499995500 is a term because 3280499995500 = C(27001,3) = C(4,3) * C(15,3) * C(31,3) * C(135,3). %Y A364151 Cf. A000292, A068143 (analog for triangular numbers), A196568 (only two factors allowed), A363636, A364152. %Y A364151 Row n=3 of A374498. %K A364151 nonn %O A364151 1,2 %A A364151 _Pontus von Brömssen_, Jul 15 2023 %E A364151 More terms from _Jinyuan Wang_, Jul 31 2023