47895

Appears in sequences

• Smallest triangular number with digit sum n (or 0 if no such number exists).at n=32A062688
• Duplicate of A062688.at n=33A067181
• Triangular numbers with strictly increasing sum of digits.at n=12A068808
• 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=24A073873
• Hexagonal numbers (A000384) which are sum of 2 other hexagonal numbers > 0.at n=34A133215
• Triangular numbers T from A000217 such that (4*T+1)/13 is prime.at n=16A208294
• Least triangular number t such that t = prime(n)*triangular(m) for some m>0, or 0 if no such t exists.at n=26A225503
• Triangular numbers which become primes when their rightmost digit is removed.at n=36A227936
• Triangular numbers with strictly increasing product of digits.at n=26A246753
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 929", based on the 5-celled von Neumann neighborhood.at n=32A273781
• Triangular numbers that are repdigits with length > 2 in some base.at n=24A274084
• Numerators of rational coefficients which are ratio of Brent's coefficients -A[n,2]/A343480.at n=33A380947
• Hexagonal numbers that are products of exactly four distinct primes.at n=25A381920