65676

Appears in sequences

• Fibonacci sequence beginning 0, 6.at n=21A022089
• Gilda's numbers: numbers k such that if a Fibonacci sequence is formed with first term = a certain absolute value between decimal digits in k (A007953) and second term = sum of decimal digits in k (A040997), then k itself occurs as a term in the sequence.at n=26A042947
• Fourth-from-right diagonal of triangle A121207.at n=8A045499
• Numbers n such that 87*2^n-1 is prime.at n=48A050569
• a(n) = index of triangular number A077002(n).at n=13A077003
• Number of unrooted two-face maps in the plane (considered up to orientation-preserving homeomorphism) with the faces of equal degree n: planar maps with a distinguished outside face.at n=12A113183
• Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} in which the size of the last block is k, 1<=k<=n; the blocks are ordered with increasing least elements.at n=57A124496
• a(n) = 4*n^3 + 5*n^2 + 2*n + 1.at n=25A204674
• Number of Sidon subsets of {1,...,n} of size 4.at n=38A241688
• Number of length-n ternary strings x with the property that if w is a subword of x and |w| >= 3, then w reversed is not a subword of x.at n=20A330010