54 = 12 + 3 + 4 + 5 + 6 + 7 + 8 + 9
54 = 9 + 8 + 7 + 6 + (5 + 4 + 3) × 2 × 1
54 = 0^0 + 1^8 + 2^7 − 3^9 + 4^5 + 5^6 + 6^2 + 7^4 + 8^3 + 9^1
54 , smallest number with 3 representations as a sum of 3 positive squares: 54 = 1^2 + 2^2 + 7^2 = 2^2 + 5^2 + 5^2 = 3^2 + 3^2 + 6^2
a(n) = 6*n^2.
54 = 1 + 1 + 2 + 3 + 5 + 8 + 13 + 21
54 = (111 − 1)/(1 + 1) − 1
= 2 × (22 + 2 + 2) + 2
= 3 × 3 × (3 + 3)
= 44 + (44 − 4)/4
= 55 − 5/5
= 66 − 6 − 6
= 7 × 7 + 7 − (7 + 7)/7
= 8 × 8 − (88 − 8)/8
= 9 × 9 − 9 − 9 − 9
546 = 16 + 176 + 196 + 226 + 316 + 376 + 376 + 416 + 496
Numbers k such that k^4 + 1 is prime.
Number of ways to partition 2n+1 into distinct positive integers, n = 9
Factors: 1, 2, 3, 6, 9, 18, 27, 54
Fifty-four
Representations, Binary to Hexadecimal:
110110_2
2000_3
312_4
204_5
130_6
105_7
66_8
60_9
4a_11
46_12
42_13
3c_14
39_15
36_16
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Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
