78400

Appears in sequences

• Squares of even octagonal numbers.at n=5A014794
• a(n) = (7*n)^2.at n=40A016982
• a(n) = (8*n)^2.at n=35A017066
• a(n) = (10*n)^2.at n=28A017270
• a(n) = (11*n + 5)^2.at n=25A017450
• a(n) = (12*n + 4)^2.at n=23A017570
• Triangle read by rows: cube of the lower triangular mean matrix.at n=44A027447
• First diagonal of A027447.at n=8A027451
• Smallest nontrivial extension of n^2 which is a square.at n=27A030686
• Squares with initial digit '7'.at n=23A045791
• (Terms in A014762)/4.at n=28A051514
• Denominator of 1/49 - 1/n^2.at n=33A061048
• Denominator of 1/64 - 1/n^2.at n=27A061050
• Squares arising in A063076.at n=9A063082
• Squares which when reversed are primes (ignore leading zeros).at n=26A068989
• Squares x such that x + reverse of x is a prime.at n=25A072367
• a(n) = A074639(A074645(n)).at n=25A074646
• Perfect powers whose digit reversal is prime.at n=29A088112
• Generalized Stirling2 array S_{4,4}(n,k).at n=24A090214
• Denominators of squares of harmonic numbers A001008/A002805.at n=7A103931