45444

Appears in sequences

• Sums of antidiagonals of A099233.at n=13A099236
• Expansion of g.f.: 1/((1 - 2*x^2 + x^4 + 2*x^6 - x^8)*(1 - 2*x^2 - x^4 + 2*x^6 - x^8)).at n=26A147607
• Smallest sequence which lists the position of digits "4" in the sequence.at n=28A167454
• Denominators of the sequence s(n) of the sum resp. product of fractions f(n) defined recursively by f(1) = 5/1; f(n+1) is chosen so that the sum and the product of the first n terms of the sequence are equal.at n=3A225164
• Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum not 1 3 6 or 8 and every diagonal and antidiagonal sum 1 3 6 or 8.at n=6A252049
• Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not 1 3 6 or 8 and every diagonal and antidiagonal sum 1 3 6 or 8.at n=3A252052
• Numbers which have only digits 4 and 5 in base 10.at n=38A256290
• Records of A058249: (Smallest prime >= 2^n) - (largest prime <= 2^n).at n=48A331620
• Number of collinear triples in a 4 X n rectangular grid.at n=40A334706
• Number of grains of sand required to be added to one cell at the origin in an initially empty and infinite 3D cubic grid for the 3D sandpile model such that the distance from the origin of the furthest nonempty cell along the axes is n.at n=15A351783
• Irregular triangle read by rows: T(n,k), n>=1, k>=1, in which column k lists the numbers of A353689 multiplied by A000330(k), and the first element of column k is in row A000217(k).at n=38A353690
• Numbers k for which sigma(k - x) + sigma(k + x) = 8*k has at least one nonnegative solution.at n=19A384841