18854

Appears in sequences

• Coordination sequence for MgNi2, Position Ni2.at n=34A009932
• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1 and a(2) = a(3) = 2.at n=17A049907
• Number of one-element transitions among partitions of the integer n for labeled parts.at n=18A094533
• Triangle T, read by rows, where the n-th diagonal of T equals the BINOMIAL transform of the (n-1)-th diagonal of T^2 for n>=1, with the zeroth diagonal set to all 1's and where T^2 denotes the matrix square of T.at n=28A141712
• Triangle T, read by rows, where the n-th diagonal of T equals the BINOMIAL transform of the (n-1)-th diagonal of T^2 for n>=1, with the zeroth diagonal set to all 1's and where T^2 denotes the matrix square of T.at n=29A141712
• Column 0 of triangle A141712.at n=7A141713
• Matrix square of triangle T = A141712, where the n-th diagonal of T equals the BINOMIAL transform of the (n-1)-th diagonal of T^2.at n=21A141715
• Number of nondecreasing arrays of n 0..n-1 integers with the sum of their 5th powers equal to sum(i^5,i=0..n-1).at n=20A216633
• The number of 2 X 2 symmetric positive definite matrices whose entries are integers x,y,z satisfying x^2 + y^2 + z^2 <= n^2.at n=33A219744
• Smallest k such that A002522(k) and A002522(k+2n) are successive primes of the form m^2+1.at n=42A245463
• Not appropriate for the OEIS.at n=5A248690
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 133", based on the 5-celled von Neumann neighborhood.at n=30A270234
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 219", based on the 5-celled von Neumann neighborhood.at n=29A270932
• a(n) = n^4 + 3*n^3 + 2*n^2 - 2*n.at n=11A330651