23959

Appears in sequences

• Strong pseudoprimes to base 35.at n=11A020261
• Strong pseudoprimes to base 61.at n=13A020287
• For n>0, a(n) is the least quasi-Carmichael number to base -n, extended to n=0 with the least composite squarefree integer.at n=26A029591
• Recip transform of 2*(1 + x^3 + x^4 + x^5 + x^6)-1/(1-x).at n=9A049170
• Male of (1/(n+1), n/(1+n)) pair function used to get a dual population Fibonacci.at n=24A100581
• 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), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.at n=8A149705
• 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, 0), (0, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.at n=7A151189
• Products of three distinct happy primes A035497.at n=36A154717
• Numerator of Euler(n, 6/31).at n=3A157682
• a(n) = 22*n^2 + 1.at n=33A158537
• Number of arrangements of 3 nonzero numbers x(i) in -n..n with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero.at n=28A190072
• Numbers n such that floor((3/2)^n)-floor((3/2)^(n-1)) is a prime number.at n=29A243591
• The total number of different isosceles trapezoids, excluding squares, that can be drawn on an n X n square grid where the corners of each individual trapezoid lie on a lattice point.at n=38A272459
• Odd numbers k such that A064989(k) is in A340151.at n=33A340091
• a(n) = 25*n^2/2 - 11*n/2 + 1.at n=44A383465