97461

Appears in sequences

• a(n) = n^2*(n^2 + 1)/2.at n=21A037270
• (Terms in A029617)/2.at n=47A051432
• Terms of A073872 that do not change their position in the rearrangement; i.e., values of A073872(n) which equal n(n+1)/2.at n=34A073873
• Numbers that cannot be expressed as a sum of 2 triangular numbers and a power of 2.at n=27A112665
• Triangular numbers that can be written as sum of two positive cubes.at n=8A113958
• Triangular numbers for which the number of divisors is also a triangular number.at n=28A116541
• Partial sums of dodecahedral numbers (A006566).at n=17A116689
• Triangular numbers for which the sum of the digits is a cube.at n=32A117803
• Triangular numbers t which are average of two consecutive primes p and p+4.at n=36A129752
• Triangle T(n, k) = A010048(n, k)*A010048(n, k-1)/Fibonacci(n), read by rows.at n=38A172373
• Triangle T(n, k) = A010048(n, k)*A010048(n, k-1)/Fibonacci(n), read by rows.at n=42A172373
• a(n) = sum of numbers from 1 to pi(n), where pi(n) = A007955(n).at n=20A184390
• a(n) = m*(m+1)/2, where m = floor(n^(3/2)).at n=57A185541
• Row sums of the triangle A045975.at n=20A204558
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and even trace.at n=20A210378
• a(n) = (Fibonacci(5n)/Fibonacci(n) - 5)/50.at n=7A214982
• If x is in the sequence then so are x^2 and x(x+1)/2.at n=35A241241
• a(n) = (n^2 + (n+1)^2)*(n^2 + (n+1)^2 + 2*n*(n+1)).at n=10A272850
• Chessboard rectangles sequence (see Comments), also A037270 interleaved with A163102.at n=42A317714
• Numbers c such that there is a Pythagorean triple (a,b,c) such that (A001414(a), A001414(b), A001414(c)) is also a Pythagorean triple.at n=3A337540