- made by his son,
George H. Darwin. The term
tribonacci was
suggested by
Feinberg in 1963. The
tribonacci constant 1 + 19 + 3 33 3 + 19 − 3 33 3 3 = 1...
- 274's sum of its
proper divisors is 140. The
number 274 is the 13th
tribonacci number. This is
defined by the
equations P(0)=P(1)=0 P(2)=1 and...
- In mathematics, the
Rauzy fractal is a
fractal set ****ociated with the
Tribonacci substitution s ( 1 ) = 12 , s ( 2 ) = 13 , s ( 3 ) = 1 . {\displaystyle...
-
heptagonal number. an
icosioctagonal number. a
centered octagonal number. a
tribonacci number. an open
meandric number. the
ninth member of the Mian-Chowla sequence...
- number.
Given Euler's
totient function, φ(44) = 20 and φ(69) = 44. 44 is a
tribonacci number,
preceded by 7, 13, and 24,
whose sum it equals. 44 is the number...
- the 52nd
prime (239) plus 52. 291 is one of the
positions of “c” in the
tribonacci word abacabaab…
defined by a->ab, b->ac, c->a. 291 is the sum of six 4th...
- P(n − 2) + P(n − 3).
Generating the next
number by
adding 3
numbers (
tribonacci numbers), 4
numbers (tetranacci numbers), or more. The
resulting sequences...
-
primes (139 + 149 + 151 + 157 + 163 + 167),
nontotient 927 = 32 × 103,
tribonacci number 928 = 25 × 29, sum of four
consecutive primes (227 + 229 + 233...
- 5743 =
number of
signed trees with 9
nodes 5749 – super-prime 5768 –
tribonacci number 5776 = 762 5777 –
smallest counterexample to the
conjecture that...
-
palindromic prime in
bases 10 (1060110) and 30 (BNB30) 10609 = 1032,
tribonacci number 10631 =
palindromic prime in base 30 (BOB30) 10646 = ISO 10646...
