51827

Properties

Appears in sequences

• Smaller term of closest safe prime pairs.at n=22A059323
• G.f.: A(x) = x/series_reversion(x*G108993(x)) where G108993(x) is g.f. of A108993.at n=6A108996
• Primes of the form floor( (k*(sqrt(3)*k-1))/sqrt(2) ).at n=27A180449
• 1-sequence of reduction of triangular number sequence by x^2 -> x+1.at n=13A192245
• Number of n X 3 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 4 binary array having nonzero determinant, with rows and columns of the latter in lexicographically nondecreasing order.at n=7A227555
• T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having nonzero determinant, with rows and columns of the latter in lexicographically nondecreasing order.at n=47A227558
• Initial members of prime quadruples (n, n+2, n+144, n+146).at n=30A248523
• The first prime of 8 consecutive primes a, b, c, d, e, f, g, h such that a + g = c + e and b + h = d + f.at n=37A292618
• Partial sums of A299279.at n=27A299280
• Prime numbersat n=5302