A341992 Take a standard 6-sided die and concatenate the numbers that can be seen around any of the corners and sort into increasing order.

123, 124, 132, 135, 142, 145, 153, 154, 213, 214, 231, 236, 241, 246, 263, 264, 312, 315, 321, 326, 351, 356, 362, 365, 412, 415, 421, 426, 451, 456, 462, 465, 513, 514, 531, 536, 541, 546, 563, 564, 623, 624, 632, 635, 642, 645, 653, 654

Offset: 1

Author

Halfdan Skjerning, Feb 25 2021

Keywords

• nonn
• base
• fini
• full

Comments

These are the three-digit numbers that can be read from the simultaneously visible faces that share the same corner on a 6-sided die with a traditional layout (in which the number of pips of opposite sides add up to 7).

3-digit numbers such that the digits are distinct and in 1..6, no two digits add up to 7. - Jianing Song, Mar 21 2021

Formula

a(n) + a(49-n) = 777 for n = 1..48. - Rémy Sigrist, Feb 26 2021