107416

Appears in sequences

• Triangular numbers whose reverse is prime.at n=21A066751
• Smallest n-digit triangular numbers with property that digits alternate in parity, or 0 if no such number exists.at n=5A068883
• Triangular numbers which are one more than a product of distinct triangular numbers.at n=34A083517
• Triangular numbers whose digit reversal is prime; trailing zeros are permitted.at n=28A115704
• a(n) = t(n)_t(n) where t() = triangular numbers A000217.at n=20A122628
• Triangular numbers which are sums of 6 consecutive primes.at n=10A173423
• Triangular numbers representable as triangular(x)*triangular(y)+1.at n=21A226389
• Hexagonal numbers (A000384) in which parity of digits alternates.at n=22A297645
• Number of 8-element subsets of [n] whose sum is a triangular number.at n=18A320854
• a(n) = (m(n)^2 + 3)*(m(n)^2 + 7)/32, where m(n) = 2*n - 1.at n=21A336535