56629

Properties

Appears in sequences

• Expansion of x/(1 - 5*x - 9*x^2).at n=7A015545
• Primes whose digit reversal is a triangular number.at n=14A115705
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 0, 1), (0, 1, 0), (1, -1, 0)}.at n=12A148120
• a(n) = 52*n^2 + 1.at n=33A158644
• Numbers n such that 30n-13, 30n-11, 30n-1, 30n+1, 30n+11, 30n+13 are all prime.at n=20A175683
• The smallest A(m) such that the interval (A(m)*n, A(m+1)*n) contains exactly one element of A, where A is the sequence of primes p for which p-2 is not prime.at n=21A201828
• Hilltop maps: number of n X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 n X n array.at n=3A218586
• Hilltop maps: number of nX4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 nX4 array.at n=3A218588
• T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 nXk array.at n=24A218592
• Hilltop maps: number of 4Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 4Xn array.at n=3A218595
• Positions of pandigital 10-digit numbers after the decimal point in the decimal expansion of Pi.at n=24A280183
• Primes p such that p, x+y, x-y, p-x*y and p+x*y are prime, where y = p mod 5 and x = (p-y)/5.at n=36A342771
• Prime numbersat n=5742