31707
domain: N
Appears in sequences
- a(n) = Sum_{k=0..2n-1} T(n,k)*T(n,k+1), T given by A027926.at n=7A027995
- Expansion of (1-2*x)/(1 - 3*x - x^2 + 2*x^3).at n=10A052550
- a(n) = periodic part of decimal expansion of n/n-th prime (leading 0's moved to end).at n=12A060251
- Number of (n+1)X9 binary arrays with no 2X2 subblock containing fewer than two 1s.at n=0A184206
- T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock containing fewer than two 1s.at n=28A184207
- T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock containing fewer than two 1s.at n=35A184207
- T(n,k)=Unmatched value maps: number of nXk binary arrays indicating the locations of corresponding elements not equal to any king-move neighbor in a random 0..2 nXk array.at n=46A218823
- T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having x11-x00 less than x10-x01.at n=35A251268
- Ulam numbers k such that k/3 is also an Ulam number.at n=43A287212