506250000

Appears in sequences

• a(n) = (6*n)^4.at n=25A016912
• a(n) = (8*n+6)^4.at n=18A017140
• a(n) = (9*n + 6)^4.at n=16A017236
• a(n) = (10*n)^4.at n=15A017272
• a(n) = (11*n + 7)^4.at n=13A017476
• a(n) = (12*n + 6)^4.at n=12A017596
• Squares that remain squares when prefixed with a 9.at n=13A167044
• Number of ways to place k non-attacking semi-knights on an n x n chessboard, sum over all k>=0.at n=5A182562
• Number of (n+2)X(3+2) 0..1 arrays with nondecreasing sum of every three consecutive values in every row and column.at n=8A251189
• Lower of a pair of adjacent perfect powers, both with exponents > 2.at n=22A340700