66844

Appears in sequences

• Stern's sequence: a(1) = 1, a(n+1) is the sum of the m preceding terms, where m*(m-1)/2 < n <= m*(m+1)/2 or equivalently m = ceiling((sqrt(8*n+1)-1)/2) = A002024(n).at n=18A005230
• Constant term of the reduction by x^2->x+1 of the polynomial p(n,x) defined at Comments.at n=16A193006
• Displacement under constant discrete unit surge.at n=15A207361
• Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant >= 2n.at n=9A211152
• Number of compositions of n where the difference between largest and smallest parts equals six.at n=15A323123