46665

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 48.at n=8A031726
• a(n) = n^4 - (n-1)^4 + (n-2)^4 - ... 0^4.at n=17A062392
• Doubly hexagonal numbers.at n=9A063249
• Triangular numbers with internal digits 6.at n=18A069698
• Triangular numbers with internal digits also forming a triangular number.at n=38A069702
• Terms of A073872 that do not change their position in the rearrangement; i.e., values of A073872(n) which equal n(n+1)/2.at n=23A073873
• Triangular numbers whose external digits as well as internal digits form triangular numbers.at n=27A077368
• Triangular numbers for which the sum of the digits equals the sum of the digits of the next triangular number.at n=14A117511
• Triangular numbers for which the sum of the digits is a cube.at n=15A117803
• Triangular numbers composed of digits {4,5,6}.at n=10A119202
• a(n) = n*Fibonacci(n) + binomial(n, 2).at n=17A132920
• a(n) = 81*n^2 + 9.at n=23A157888
• Triangular numbers t such that all the digits needed to write the consecutive triangular numbers from 0 to t fill exactly an equilateral triangle (no holes, no overlaps).at n=20A158030
• Triangular numbers of the form 2p-1 where p is prime.at n=40A217000
• Numbers of the form 6^j + 9^k, for j and k >= 0.at n=30A226830
• Number of rooted highly irregular trees with n nodes.at n=33A259863
• Triangular numbers representable as 3^x + y^3.at n=10A262724
• Odd numbers that are not of the form p + 2^a + 2^b with b > a > 0, and p prime.at n=10A268693
• a(n) is the number of ordered ways to tile a strip of length n+2 with white tiles of odd lengths summing to length n and two red squares.at n=16A276129
• The first of two consecutive triangular numbers the sum of which is equal to the sum of two consecutive prime numbers.at n=20A298462