140185

Appears in sequences

• a(n) = n^2*(n^2 + 1)/2.at n=23A037270
• Triangular numbers whose reverse is prime.at n=28A066751
• The terms of A073215 (sums of two powers of 23) divided by 2.at n=12A072822
• Triangular numbers which are sums of 5 consecutive primes.at n=13A173421
• Row sums of the triangle A045975.at n=22A204558
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and even trace.at n=22A210378
• Sequence of distinct least triangular numbers such that the arithmetic mean of the first n terms is also a triangular number. Initial term is 0.at n=17A236415
• a(n) = A000217(A000217(n)+1).at n=32A267707
• a(n) = (n^2 + (n+1)^2)*(n^2 + (n+1)^2 + 2*n*(n+1)).at n=11A272850
• Triangular numbers that are sum of squares of two distinct triangular numbers.at n=28A346386
• Number of distinct integers of the form (x^n + y^n) mod n^4.at n=22A366420