A077554 Final terms of rows of A077553.

4, 6, 9, 10, 15, 25, 21, 25, 35, 49, 35, 49, 55, 77, 121, 65, 77, 91, 121, 143, 169, 119, 121, 143, 169, 187, 221, 289, 169, 187, 209, 221, 247, 289, 323, 361, 247, 253, 289, 299, 323, 361, 391, 437, 529, 323, 361, 377, 391, 437, 493, 529, 551, 667, 841, 437

Offset

0,1

Comments

If there are two sets of distinct composite numbers satisfying the above condition then the set with lesser product is chosen irrespective of the number of prime divisors. Perhaps the ambiguity may not arise. E.g., row 6 is 4,6,9,10,15,25. This row cannot be extended to get the next row without bringing in another prime because every number divisible by 2,3 or 5 will be a multiple of one of the previous terms. Hence in row 7, prime 7 has to be brought in and then we get a new set of numbers: 4,6,9,10,14,15,21.

Links

Table of n, a(n) for n=0..55.

Crossrefs

Cf. A002024.

Cf. A001358, A005843, A077553, A077555, A087112.

Sequence in context: A133234 A111206 A087112 * A262812 A287296 A275197

Adjacent sequences: A077551 A077552 A077553 * A077555 A077556 A077557

Keyword

nonn

Author

Amarnath Murthy, Nov 10 2002

Extensions

More terms from Ray Chandler, Aug 24 2003

Status

approved