209664

Appears in sequences

• Numbers n such that sigma(n+1) = n + phi(n).at n=14A068402
• Numbers n such that uphi(uphi(n)) = n/2.at n=11A071008
• Number of 3 X 3 symmetric matrices over Z(n) having determinant 1.at n=11A115224
• a(n) = binomial(n+2,3)*4^3.at n=25A141478
• Number of ways to place n nonattacking composite pieces rook + rider[2,4] on an n X n chessboard.at n=9A189855
• Number of the Lipschitz quaternions in a reduced system modulo n.at n=25A227499
• Number of orthogonal 3 X 3 matrices over the ring Z/nZ.at n=38A264083
• Number of equidistributed binary strings of length n.at n=30A264695
• Prime shadows of colossally abundant numbers, A004490.at n=21A353561
• a(n) is the least number with exactly n divisors of the form 5*k+1.at n=26A364586
• a(n) is the least number with exactly n divisors of the form 5*k+4.at n=27A364600
• Expansion of e.g.f. (1/x) * Series_Reversion( x*(1 + x^3*log(1-x)) ).at n=8A370995