40993

Properties

Appears in sequences

• Prime number spiral (clockwise, Northeast spoke).at n=33A054553
• Primes p such that |p - q| is a square, where q is the reversal of p.at n=41A059798
• Right diagonal of triangle in A072467.at n=27A072469
• Non-palindromic primes which on subtracting their reversal give perfect squares.at n=20A080177
• Primes p of Erdos-Selfridge class 4+ with largest prime factor of p+1 not of class 3+.at n=29A129472
• Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 4 X 4 X 4 subtriangle summing to 6.at n=8A154059
• Number of 5-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-bishop's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions.at n=18A187609
• Primes p such that p^2*q^2*r^2 + 12 and p^2*q^2*r^2 - 12 are primes where q and r are next two primes after p.at n=20A240725
• a(n) = (binomial(2n, n) - 2) mod n^3.at n=44A246133
• Number of odd singletons in all partitions of n (n>=0).at n=39A265257
• Numbers whose septenary, octal and nonary representations are prime when read in decimal.at n=30A281252
• Expansion of g.f. A(x) satisfying 1/x = Sum_{n=-oo..+oo} x^n * (A(x) - x^n)^(n-1), with a(0) = 1, a(1) = 1.at n=13A363141
• Prime numbersat n=4291