30744

Appears in sequences

• a(n) = 8*a(n-1) - a(n-2); a(0) = 0, a(1) = 1.at n=6A001090
• a(n) = 5th Chebyshev polynomial (second kind) evaluated at 2^n.at n=2A020542
• Denominators of continued fraction convergents to sqrt(15).at n=11A041023
• T(2n+1,n), where T is the array in A055830.at n=7A055835
• Triangle of numbers {a(n,k), n >= 0, 0<=k<=n} defined by a(0,0)=1, a(n,0)=A006013(n), a(n+1,n)=A001764(n+1), a(n,m) = Sum A001764(n-k)*a(n,k), k=0..m.at n=32A073148
• Numbers n such that n + sum of prime factors of n = (n+1) + sum of prime factors of (n+1).at n=28A075654
• Consider recurrence b(0) = (2n+1)/2, b(n) = b(0)*floor(b(n-1)); sequence gives first integer reached.at n=29A087675
• Numerators of a Fibonacci related transform of 1/(n+1).at n=8A097346
• Numbers n such that p(10n) is prime, where p(n) is the number of partitions of n.at n=32A114170
• Gaussian column reduction of Hankel matrix for central Delannoy numbers.at n=39A118384
• Number of permutations of 0..n-1 with all sums of 5 adjacent terms unique.at n=7A152350
• Number of permutations of floor(i*9/8), i=0..n-1, with all sums of 5 adjacent terms unique.at n=7A152368
• Exponential Riordan array [1+x^2*sec(x), x].at n=46A166378
• Union of A057080 and A001090.at n=11A177187
• Molecular topological indices of the Moebius ladders.at n=20A192833
• Molecular topological indices of the prism graphs Y_n.at n=20A192838
• Number of n X n symmetric 0..2 arrays with no element equal to any horizontal or vertical neighbor and with new values 0..2 introduced in lower triangular row major order.at n=5A193268
• Number of (w,x,y,z) with all terms in {1,...,n} and min{|w-x|,|w-y|}=min{|x-y|,|x-z|}.at n=26A212579
• First occurrence of n in A225399, or -1 if n does not appear in A225399.at n=31A225400
• Number triangle associated to Chebyshev polynomials of the second kind.at n=49A228161