23119

Appears in sequences

• Discriminants of quintic fields with 2 complex conjugates (negated).at n=44A023684
• Expansion of (1+2*x+4*x^2+8*x^3)/(1-x-16*x^5).at n=14A098582
• Number of walks within N^2 (the first quadrant of Z^2) starting and ending at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 0), (0, 1), (1, -1)}.at n=14A151336
• a(n) = 20*n^2 - 1.at n=33A158491
• a(n) = 80*n^2 - 1.at n=16A158774
• Numbers k such that k![10]-2 is prime, where k![10] is the ten-fold multifactorial.at n=63A283559