45753

Appears in sequences

• Concatenation of triangular number k and its 10's complement is prime.at n=19A108970
• Triangular numbers that are the product of 2 palindromes greater than 1.at n=31A115744
• Triangular numbers t such that t+10 is a prime.at n=39A129755
• Triangular numbers of the form 2p-1 where p is prime.at n=39A217000
• Integers m such that A342805(m) = m+3.at n=29A342806
• Number of ordered partitions of an n-set without blocks of size 4.at n=7A343787
• Triangular numbers (A000217) whose second arithmetic derivative (A068346) is also a triangular number.at n=44A351131
• Expansion of g/(1 - x^3*g^3), where g = 1+x*g^3 is the g.f. of A001764.at n=8A391062