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A301523 Integers which can be partitioned into two distinct factorials. 0! and 1! are not considered distinct. 2
3, 7, 8, 25, 26, 30, 121, 122, 126, 144, 721, 722, 726, 744, 840, 5041, 5042, 5046, 5064, 5160, 5760, 40321, 40322, 40326, 40344, 40440, 41040, 45360, 362881, 362882, 362886, 362904, 363000, 363600, 367920, 403200, 3628801, 3628802, 3628806, 3628824, 3628920, 3629520, 3633840, 3669120, 3991680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers of the form i! + j! where i > j > 0. - Altug Alkan, Mar 23 2018

Primes in this sequence are A088332(n) for n > 1.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000

EXAMPLE

    + |   1    2    6   24

  ----+--------------------

    1 |

    2 |   3;

    6 |   7,   8;

   24 |  25,  26,  30;

  120 | 121, 122, 126, 144;

CROSSREFS

Cf. A000142, A001048, A038507, A059590, A088332, A301593.

Sequence in context: A037208 A102007 A152486 * A105756 A152057 A177689

Adjacent sequences:  A301520 A301521 A301522 * A301524 A301525 A301526

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Mar 23 2018

STATUS

approved

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Last modified November 22 18:55 EST 2019. Contains 329410 sequences. (Running on oeis4.)