5, Prime Number, Fibonacci Number, Deficient number
5 = (4 × 4 + 4)÷ 4 = (44 − 4!) ÷ 4
54 = 24+24+34+44+44
25 - 1 = 31
Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
5
5, Prime Number, Fibonacci Number, Deficient number
5 = (4 × 4 + 4)÷ 4 = (44 − 4!) ÷ 4
54 = 24+24+34+44+44
25 - 1 = 31
Undergraduate Texts in Mathematics
Graduate Studies in Mathematics