446040

Appears in sequences

• Triangular numbers which are 9-almost primes.at n=11A076583
• Triangular numbers with only even digits.at n=23A117978
• Triangular numbers composed of digits {0,4,6}.at n=5A119073
• Numbers whose sum of divisors is the cube of one of their divisors.at n=7A303993
• Expansion of x^2*(10-5*x+x^2)/((1-x)^4*(1-x^2)).at n=42A331429
• Triangle read by rows: T(n,k) is the number of oriented series-parallel networks with n colored elements and without multiple unit elements in parallel using exactly k colors.at n=27A339297
• Number of oriented series-parallel networks with n labeled elements and without multiple unit elements in parallel.at n=6A339301
• Triangular numbers T(i) that can be expressed as the sum of 2 positive triangular numbers, T(j)+T(k), and for which i+j+k is a triangular number, where T is A000217.at n=14A343426
• Positions of records in A344590.at n=14A344588
• Irregular triangle read by rows: T(n,k) is the number of n-permutations whose second-longest cycle has length exactly k; n>=0, 0<=k<=floor(n/2).at n=34A349979
• Triangular numbers such that the three numbers before it and the three numbers after it are squarefree.at n=24A374393