39832

Appears in sequences

• Distinct even elements in 3-Pascal triangle A028262 (by row).at n=35A028269
• Even elements to right of central elements in 3-Pascal triangle A028262.at n=27A028273
• Rank of (1,1,...,1) (n 1's) when {0,1,2,...}^n is lexicographically ordered.at n=8A057553
• Second elementary symmetric function of the first n terms of (1,2,2,3,3,4,4,5,5...).at n=30A203298
• Number of n X 2 (-1,0,1) arrays of determinants of 2 X 2 subblocks of some (n+1) X 3 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=16A226866
• Number of n X 2 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.at n=8A278319
• T(n,k)=Number of nXk 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.at n=46A278325
• a(n) is the sum of quadratic nonresidues of A002145(n) (the n-th prime == 3 mod 4).at n=39A282036
• Let p = n-th prime == 7 mod 8; a(n) = sum of quadratic nonresidues mod p.at n=19A282043
• a(n) = A008412(n-1) + A008412(n-2) for n>1, a(0)=0, a(1)=1.at n=21A287324