867 = 12 + 345 + 6 + 7 × 8 × 9
867 = 9 × 87 + 6 + 54 + 3 + 21
867 = 0^7 + 1^9 − 2^6 − 3^8 + 4^1 + 5^5 + 6^3 + 7^2 + 8^4 + 9^0
a(n) = 3*n^2
Number of edges in an equilateral triangle when n internal equilateral triangles are drawn between the 3n points that divide each side into n+1 equal parts. (n=12)
Factors: 1, 3, 17, 51, 289, 867
Representations, Binary to Hexadecimal:
1101100011_2
1012010_3
31203_4
11432_5
4003_6
2346_7
1543_8
1163_9
719_11
603_12
519_13
45d_14
3cc_15
363_16
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Undergraduate Texts in Mathematics
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