-169
domain: Z
Appears in sequences
- Coefficients of modular function G_3(tau).at n=16A005761
- arctan(sin(tan(x)))=x-1/3!*x^3+1/5!*x^5-169/7!*x^7-1823/9!*x^9...at n=3A012014
- cos(arcsin(arcsin(x)))=1-1/2!*x^2-7/4!*x^4-169/6!*x^6-8751/8!*x^8...at n=3A012067
- sech(arcsin(arctanh(x)))=1-1/2!*x^2-7/4!*x^4-169/6!*x^6-9199/8!*x^8...at n=3A012145
- Coefficients of the '6th-order' mock theta function phi(q).at n=41A053268
- a(n) = bin_prime_sum(fibonacci(A001651[n])), where fibonacci(A001651[n]) is A014437[n].at n=24A059878
- Reflected (see A074058) pentanacci numbers A074048.at n=21A074062
- 4th differences of partition numbers A000041.at n=57A081094
- Alternating partial sums of A000217.at n=25A083392
- A generalized Jacobsthal sequence.at n=9A083943
- A Chebyshev transform of A099456 associated to the knot 9_44.at n=6A099457
- Alternating sum of diagonals in A060177.at n=37A104575
- a(n+3) = 6*a(n) - 5*a(n+2), a(0) = 1, a(1) = -7, a(2) = 35.at n=3A110213
- Row sums of number triangle A112334.at n=57A112335
- a(4n) = -n^2, a(4n+1) = n^2, a(4n+2) = 1-n^2, a(4n+3) = n*(n+1).at n=52A131118
- a(n) = (5 + (-2)^n)/3.at n=9A140966
- Hankel transform of a transform of Jacobsthal numbers.at n=42A141124
- Expansion of (1-5x^2-7x^3-2x^4+x^6)/((1-x)(1-x^3)^2).at n=15A141365
- a(n) = 3/8 + (3/8)*(-1)^n + ((n+1)/4)*(-1)^(n+1) + ((n+2)*(n+1)/4)*(-1)^(n+2).at n=25A152032
- Flattened triangle read by rows such that each row has 2n+1 entries, T(n, k) = T(n, k+1) + T(n, k+2) for k < 2n-1, T(n, n) = Fibonacci(n), and T(n, n-1) = Fibonacci(n-1) for n > 0.at n=63A152459