A152089 Numbers n such that n! is not the sum of two nonnegative triangular numbers.

6, 11, 12, 14, 18, 19, 20, 22, 23, 25, 26, 30, 31, 35, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 55, 56, 57, 58, 60, 61, 62, 63, 64, 65, 67, 69, 70, 71, 73, 74, 75, 76, 77, 78, 82, 83, 84, 87, 88, 89, 90, 91, 92, 93, 94, 97, 98, 100, 101, 103, 104, 105, 106, 107, 108

Offset

1,1

Comments

Up to 300 these are also terms: 110, 111, 112, 113, 115, 116, 117, 119, 120, 121, 122, 123, 124, 127, 128, 130, 132, 136, 137, 138, 142, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 163, 166, 167, 168, 169, 170, 172, 174, 175, 176, 177, 179, 180, 181, 182, 183, 185, 186, 187, 188, 191, 193, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 210, 211, 213, 214, 215, 216, 218, 223, 225, 226, 227, 228, 229, 230, 231, 232, 236, 237, 238, 239, 240, 241, 243, 245, 246, 247, 249, 250, 251, 253, 255, 256, 257, 258, 260, 261, 262, 263, 265, 266, 267, 269, 270, 271, 272, 273, 274, 276, 278, 279, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 292, 293, 294, 295, 297, 298. - G. Guninski, Oct 12 2010

Links

Table of n, a(n) for n=1..71.

Factor Database, Factors of the numbers 4z!+1

Factor Database, Factors [From G. Guninski, Oct 12 2010]

G. Guninski, Factors

R. K. Guy et al., Emails about A152089

Crossrefs

Complement of A180590.

Sequence in context: A242825 A358068 A276136 * A212773 A230996 A219553

Adjacent sequences: A152086 A152087 A152088 * A152090 A152091 A152092

Keyword

nonn

Author

N. J. A. Sloane, Sep 24 2010

Extensions

69 added by N. J. A. Sloane, Sep 24 2010 using the data from the Factor Database web site.

Further terms from G. Guninski and D. S. McNeil, Sep 24 2010

Terms from 93 on from G. Guninski, Oct 12 2010

Status

approved