38936

Appears in sequences

• Numbers n not of the form i^2+(i+1)^2 such that there are integers a < b with a^2+(a+1)^2+...+(n-1)^2 = n^2+(n+1)^2+...+b^2.at n=24A094523
• Number of n X 3 binary matrices with no two 1's adjacent diagonally or antidiagonally.at n=6A181207
• Number of nX7 binary matrices with no two 1's adjacent diagonally or antidiagonally.at n=2A181211
• T(n,k)=Number of nXk binary matrices with no two 1's adjacent diagonally or antidiagonally.at n=38A181212
• T(n,k)=Number of nXk binary matrices with no two 1's adjacent diagonally or antidiagonally.at n=42A181212
• a(n) = Sum_{d|n} d*sigma(n/d)^d.at n=24A185302
• Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001011.at n=11A260277
• Numbers k such that (23*10^k + 19)/3 is prime.at n=20A294485
• Numbers k such that (10^k + 191)/3 is prime.at n=19A294916
• The number of permutations of {1,2,...,n,1,2,...,n} with the property that there are k or more numbers between the two k's in the set for k=1,...,n.at n=6A322179