40400

Appears in sequences

• Values of n^2 - 1 resulting from A050795.at n=18A050799
• Diagonal sums of number triangle A105522.at n=22A105524
• a(n) = 4*(3*n+1)*(3*n+2).at n=33A144410
• Numbers k which are concatenations k=x//y such that x^2 + y^2 is a multiple of k.at n=25A162463
• Smallest sequence which lists the position of digits "3" in the sequence.at n=27A167453
• Numbers whose decimal expansion contains only 0's and 4's.at n=20A169967
• a(n) = sinh(2*arcsinh(n))^2 = 4*n^2*(n^2 + 1).at n=10A173116
• Numbers such that each digit is the sum of two or more other digits.at n=14A203591
• Nonnegative integers whose English number-words have the identical number of letters contributing to each represented letter-frequency.at n=63A216163
• 8-digit numbers (padded with leading zeros where necessary) in which the sum of the number consisting of the first four digits and the number consisting of the last four digits equals the number consisting of the middle four digits.at n=8A293686
• Even numbers k such that the sum of divisors of k in Gaussian integers is a real number.at n=2A332532
• Numbers k such that k and k+1 both have more nonunitary than unitary prime divisors (A348121).at n=35A348122
• Numbers k such that k and k+1 both have the same number of squarefree divisors and powerful divisors.at n=16A360904