416328
domain: N
Appears in sequences
- Triangular numbers in which the sum of the external digits equals the sum of the internal digits.at n=33A088289
- a(n) = larger member of n-th pair of distinct, positive, triangular numbers whose sum and difference are also triangular numbers.at n=16A185128
- a(n) is the smallest m for which binomial(m,5) has exactly n distinct prime factors.at n=15A322158
- Triangular numbers that are palindromes in base 7.at n=15A350992
- Triangular numbers (A000217) in A353729.at n=15A370520
- Triangular numbers that are sandwiched between two squarefree semiprimes.at n=32A375384