354061

Appears in sequences

• a(n) = n^2*(n^2 + 1)/2.at n=29A037270
• G.f.: (1+x^2)/((1-3x)(1-x-x^2)).at n=11A099167
• Hexagonal numbers whose number of divisors is also a hexagonal number.at n=14A116565
• Triangular numbers which are sums of three consecutive primes.at n=17A167788
• Row sums of the triangle A045975.at n=28A204558
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and even trace.at n=28A210378
• Numbers expressible as sum of squares of two distinct positive triangular numbers exactly in two ways.at n=2A212842
• Triangular numbers of the form p*w, where p is a prime number and w is a prime power (A025475).at n=23A225674
• Pyramidal centered square numbers.at n=20A237516
• Triangular numbers that are the product of a square number and a prime number.at n=29A253653
• a(n) = (n^2 + (n+1)^2)*(n^2 + (n+1)^2 + 2*n*(n+1)).at n=14A272850
• Triangular numbers having exactly 6 divisors.at n=11A292989
• Array T(n, m) read by ascending antidiagonals: numerators of shifted Fubini numbers F(n, m) where m >= 0.at n=51A338875
• Triangular numbers that are the hypotenuse of a primitive Pythagorean triple (PPT) such that another member of the triple is also triangular.at n=3A340462
• Triangular numbers that are sum of squares of two distinct triangular numbers.at n=36A346386