112101

Appears in sequences

• Smallest triangular number whose final digits are A068125(n).at n=46A068126
• Triangular numbers with sum of digits = 6.at n=7A068128
• Triangular numbers in which neighboring digits differ at most by 1. Allowed neighbors of 9 are 0, 8 and 9.at n=20A068149
• Smallest n-digit triangular number with minimum digit sum.at n=5A069671
• Largest n-digit triangular number with minimum digit sum.at n=5A069672
• Triangular numbers with arithmetic mean of digits = 1 (sum of digits = number of digits).at n=4A069790
• Hexagonal numbers for which both the sum of the digits and the product of the digits are also hexagonal numbers.at n=23A117064
• Triangular numbers composed of digits {0,1,2}.at n=8A119033
• Triangular numbers T such that sum of the factorials of digits of T is prime.at n=32A242831
• Expansion of Product_{k>=1} 1/(1 - (5*k-4)*x^(5*k-4)).at n=39A265834
• The first of two consecutive triangular numbers the sum of which is equal to the sum of two consecutive prime numbers.at n=32A298462