345696

Appears in sequences

• Triangular numbers which are 8-almost primes.at n=28A076582
• Smith triangular numbers.at n=24A098840
• Irregular table read by rows: n-th row lists the 9 n-gonal numbers of a 3 X 3 semimagic square with the smallest magic sum. The terms of each row are arranged in the manner shown in A261816.at n=31A265141
• Refactorable triangular numbers.at n=37A272524
• Hexagonal numbers (A000384) in which parity of digits alternates.at n=29A297645
• Numbers that start a run of four consecutive triangular numbers with four distinct prime factors.at n=33A349773