67884

Appears in sequences

• Iccanobif numbers: add a(n-1) to reversal of a(n-2).at n=20A014260
• Geodesic growth sequence for Richard Thompson's group F with the standard generating set x_0, x_1.at n=10A156946
• Number of nX5 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=2A281651
• T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=23A281653
• Number of 3Xn 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=4A281655
• Expansion of Product_{k>=1} 1/(1 - x^k)^(k-phi(k)), where phi() is the Euler totient function (A000010).at n=34A307705
• Expansion of Sum_{k>0} x^(3*k)/(1 - k*x^k)^3.at n=25A363644