A363635 Ludic numbers that are products of smaller ludic numbers.

1, 25, 77, 91, 115, 119, 121, 143, 161, 175, 221, 235, 265, 287, 301, 329, 377, 407, 415, 445, 481, 493, 497, 517, 535, 581, 595, 625, 667, 697, 749, 805, 841, 851, 865, 913, 943, 1015, 1043, 1045, 1105, 1177, 1207, 1225, 1247, 1351, 1363, 1375, 1391, 1403

Offset: 1

Author

Pontus von Brömssen, Jun 19 2023

Keywords

• nonn

Examples

			1 is a term because it is a ludic number and equals the empty product.
25 is a term because 25 = 5*5 and both 25 and 5 are ludic numbers.
1015 is a term because 1015 = 5*7*29 and both 1015 and the three factors 5, 7, and 29 are ludic numbers. (This is the first term that requires more than two factors.)
		

Crossrefs

Cf. A003309, A363634, A363636.