1134225

Appears in sequences

• Least square n-gonal number greater than 1, or 0 if none exists.at n=44A100252
• A Binet type formula from a polynomial whose coefficient expansion gives a tribonacci used as it first derivative InverseZtransform: A000073.at n=19A116574
• Squares n with digit 1 that remain positive square after omitting all 1's from n.at n=20A176899
• Number of n X 5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.at n=13A208115
• Numbers n such that (the sum of the divisors of n) plus (the sum of the squares of the divisors of n) plus (the sum of the cubes of the divisors of n) is a prime number.at n=29A220586
• Numbers k such that phi(k)^phi(k) == 1 (mod sigma(k)).at n=21A248861