A086494 Group the natural numbers such that the sum of the terms of every group has a distinct prime signature not occurring earlier: (1), (2), (3, 4, 5), (6), (7, 8, 9), (10, 11, 12, 13, 14), (15, 16, 17), (18, 19, 20, 21)... Sequence contains the sum of the terms of groups.

1, 2, 12, 6, 24, 60, 48, 78, 120, 27, 252, 36, 324, 336, 504, 448, 648, 729, 1701, 972, 1800, 128, 390, 1650, 289, 3276, 4860, 6930, 3510, 6084, 2430, 7776, 6552, 9072, 7560, 3375, 3456, 9200, 13680, 4032, 8778, 8160, 7440, 8704, 26136, 8640, 19800

Offset

0,2

Links

Table of n, a(n) for n=0..46.

Crossrefs

Cf. A086495.

Sequence in context: A278255 A345469 A035877 * A354484 A107414 A133437

Adjacent sequences: A086491 A086492 A086493 * A086495 A086496 A086497

Keyword

nonn

Author

Amarnath Murthy, Jul 28 2003

Extensions

Corrected and extended by Ray Chandler, Sep 16 2003

Status

approved