21755

Appears in sequences

• Number of balanced numbers > 2^(n-1) and <= 2^n.at n=40A078555
• a(n) = A000217(A000217(n))-n^2.at n=20A086602
• Numbers n such that n^2 = 37*m^2 + 37*m +1.at n=3A105843
• Integers of the form 4n+3 for which Sum_{i=1..u} J(i,4n+3) obtains value zero exactly 7 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol.at n=27A166057
• Number of 5-ascent sequences of length n that avoid the pattern 00.at n=8A261383
• Consecutive states of the linear congruential pseudo-random number generator (1255*s + 6173) mod 29282 when started at s=1.at n=20A385339